Source

calendar / cal-hebrew.el

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
;;; cal-hebrew.el --- calendar functions for the Hebrew calendar

;; Copyright (C) 1995, 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007
;;   Free Software Foundation, Inc.

;; Author: Nachum Dershowitz <nachum@cs.uiuc.edu>
;;      Edward M. Reingold <reingold@cs.uiuc.edu>
;; Maintainer: Glenn Morris <rgm@gnu.org>
;; Keywords: calendar
;; Human-Keywords: Hebrew calendar, calendar, diary

;; This file is part of XEmacs.

;; XEmacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; XEmacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with XEmacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Synched up with: FSF Emacs 22 CVS 2007-03-30

;;; Commentary:

;; This collection of functions implements the features of calendar.el and
;; diary.el that deal with the Hebrew calendar.

;; Technical details of all the calendrical calculations can be found in
;; ``Calendrical Calculations: The Millennium Edition'' by Edward M. Reingold
;; and Nachum Dershowitz, Cambridge University Press (2001).

;; Comments, corrections, and improvements should be sent to
;;  Edward M. Reingold               Department of Computer Science
;;  (217) 333-6733                   University of Illinois at Urbana-Champaign
;;  reingold@cs.uiuc.edu             1304 West Springfield Avenue
;;                                   Urbana, Illinois 61801

;;; Code:

(defvar date)
(defvar displayed-month)
(defvar displayed-year)
(defvar entry)
(defvar number)
(defvar original-date)

(require 'calendar)

(defun hebrew-calendar-leap-year-p (year)
  "t if YEAR is a Hebrew calendar leap year."
  (< (% (1+ (* 7 year)) 19) 7))

(defun hebrew-calendar-last-month-of-year (year)
  "The last month of the Hebrew calendar YEAR."
  (if (hebrew-calendar-leap-year-p year)
      13
    12))

(defun hebrew-calendar-elapsed-days (year)
  "Days from Sun. prior to start of Hebrew calendar to mean conjunction of Tishri of Hebrew YEAR."
  (let* ((months-elapsed
          (+ (* 235 (/ (1- year) 19));; Months in complete cycles so far.
             (* 12 (% (1- year) 19))      ;; Regular months in this cycle
             (/ (1+ (* 7 (% (1- year) 19))) 19)));; Leap months this cycle
         (parts-elapsed (+ 204 (* 793 (% months-elapsed 1080))))
         (hours-elapsed (+ 5
                           (* 12 months-elapsed)
                           (* 793 (/ months-elapsed 1080))
                           (/ parts-elapsed 1080)))
         (parts                                  ;; Conjunction parts
          (+ (* 1080 (% hours-elapsed 24)) (% parts-elapsed 1080)))
         (day                                    ;; Conjunction day
          (+ 1 (* 29 months-elapsed) (/ hours-elapsed 24)))
         (alternative-day
          (if (or (>= parts 19440)    ;; If the new moon is at or after midday,
                  (and (= (% day 7) 2);; ...or is on a Tuesday...
                       (>= parts 9924)  ;;    at 9 hours, 204 parts or later...
                       (not (hebrew-calendar-leap-year-p year)));; of a
                                                                ;; common year,
                  (and (= (% day 7) 1);; ...or is on a Monday...
                       (>= parts 16789) ;;   at 15 hours, 589 parts or later...
                       (hebrew-calendar-leap-year-p (1- year))));; at the end
                                                     ;; of a leap year
       ;; Then postpone Rosh HaShanah one day
              (1+ day)
       ;; Else
            day)))
    (if ;; If Rosh HaShanah would occur on Sunday, Wednesday, or Friday
        (memq (% alternative-day 7) (list 0 3 5))
  ;; Then postpone it one (more) day and return
        (1+ alternative-day)
  ;; Else return
      alternative-day)))

(defun hebrew-calendar-days-in-year (year)
  "Number of days in Hebrew YEAR."
  (- (hebrew-calendar-elapsed-days (1+ year))
     (hebrew-calendar-elapsed-days year)))

(defun hebrew-calendar-long-heshvan-p (year)
  "t if Heshvan is long in Hebrew YEAR."
  (= (% (hebrew-calendar-days-in-year year) 10) 5))

(defun hebrew-calendar-short-kislev-p (year)
  "t if Kislev is short in Hebrew YEAR."
  (= (% (hebrew-calendar-days-in-year year) 10) 3))

(defun hebrew-calendar-last-day-of-month (month year)
  "The last day of MONTH in YEAR."
  (if (or (memq month (list 2 4 6 10 13))
          (and (= month 12) (not (hebrew-calendar-leap-year-p year)))
          (and (= month 8) (not (hebrew-calendar-long-heshvan-p year)))
          (and (= month 9) (hebrew-calendar-short-kislev-p year)))
      29
    30))

(defun calendar-absolute-from-hebrew (date)
  "Absolute date of Hebrew DATE.
The absolute date is the number of days elapsed since the (imaginary)
Gregorian date Sunday, December 31, 1 BC."
  (let* ((month (extract-calendar-month date))
         (day (extract-calendar-day date))
         (year (extract-calendar-year date)))
    (+ day                            ;; Days so far this month.
       (if (< month 7);; before Tishri
     ;; Then add days in prior months this year before and after Nisan
           (+ (calendar-sum
               m 7 (<= m (hebrew-calendar-last-month-of-year year))
               (hebrew-calendar-last-day-of-month m year))
              (calendar-sum
               m 1 (< m month)
               (hebrew-calendar-last-day-of-month m year)))
     ;; Else add days in prior months this year
         (calendar-sum
          m 7 (< m month)
          (hebrew-calendar-last-day-of-month m year)))
    (hebrew-calendar-elapsed-days year);; Days in prior years.
    -1373429)))                        ;; Days elapsed before absolute date 1.

(defun calendar-hebrew-from-absolute (date)
  "Compute the Hebrew date (month day year) corresponding to absolute DATE.
The absolute date is the number of days elapsed since the (imaginary)
Gregorian date Sunday, December 31, 1 BC."
  (let* ((greg-date (calendar-gregorian-from-absolute date))
         (month (aref [9 10 11 12 1 2 3 4 7 7 7 8]
                 (1- (extract-calendar-month greg-date))))
         (day)
         (year (+ 3760 (extract-calendar-year greg-date))))
    (while (>= date (calendar-absolute-from-hebrew (list 7 1 (1+ year))))
        (setq year (1+ year)))
    (let ((length (hebrew-calendar-last-month-of-year year)))
      (while (> date
                (calendar-absolute-from-hebrew
                 (list month
                       (hebrew-calendar-last-day-of-month month year)
                       year)))
        (setq month (1+ (% month length)))))
    (setq day (1+
               (- date (calendar-absolute-from-hebrew (list month 1 year)))))
    (list month day year)))

(defvar calendar-hebrew-month-name-array-common-year
  ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
   "Heshvan" "Kislev" "Teveth" "Shevat" "Adar"]
"Array of strings giving the names of the Hebrew months in a common year.")

(defvar calendar-hebrew-month-name-array-leap-year
  ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
   "Heshvan" "Kislev" "Teveth" "Shevat" "Adar I" "Adar II"]
"Array of strings giving the names of the Hebrew months in a leap year.")

(defun calendar-hebrew-date-string (&optional date)
  "String of Hebrew date before sunset of Gregorian DATE.
Defaults to today's date if DATE is not given.
Driven by the variable `calendar-date-display-form'."
  (let* ((hebrew-date (calendar-hebrew-from-absolute
                       (calendar-absolute-from-gregorian
                        (or date (calendar-current-date)))))
         (calendar-month-name-array
          (if (hebrew-calendar-leap-year-p (extract-calendar-year hebrew-date))
              calendar-hebrew-month-name-array-leap-year
            calendar-hebrew-month-name-array-common-year)))
    (calendar-date-string hebrew-date nil t)))

(defun calendar-print-hebrew-date ()
  "Show the Hebrew calendar equivalent of the date under the cursor."
  (interactive)
  (message "Hebrew date (until sunset): %s"
           (calendar-hebrew-date-string (calendar-cursor-to-date t))))

(defun hebrew-calendar-yahrzeit (death-date year)
  "Absolute date of the anniversary of Hebrew DEATH-DATE in Hebrew YEAR."
  (let* ((death-day (extract-calendar-day death-date))
         (death-month (extract-calendar-month death-date))
         (death-year (extract-calendar-year death-date)))
    (cond
     ;; If it's Heshvan 30 it depends on the first anniversary; if
     ;; that was not Heshvan 30, use the day before Kislev 1.
     ((and (= death-month 8)
           (= death-day 30)
           (not (hebrew-calendar-long-heshvan-p (1+ death-year))))
      (1- (calendar-absolute-from-hebrew (list 9 1 year))))
     ;; If it's Kislev 30 it depends on the first anniversary; if
     ;; that was not Kislev 30, use the day before Teveth 1.
     ((and (= death-month 9)
           (= death-day 30)
           (hebrew-calendar-short-kislev-p (1+ death-year)))
      (1- (calendar-absolute-from-hebrew (list 10 1 year))))
     ;; If it's Adar II, use the same day in last month of
     ;; year (Adar or Adar II).
     ((= death-month 13)
      (calendar-absolute-from-hebrew
       (list (hebrew-calendar-last-month-of-year year) death-day year)))
     ;; If it's the 30th in Adar I and year is not a leap year
     ;; (so Adar has only 29 days), use the last day in Shevat.
     ((and (= death-day 30)
           (= death-month 12)
           (not (hebrew-calendar-leap-year-p year)))
      (calendar-absolute-from-hebrew (list 11 30 year)))
     ;; In all other cases, use the normal anniversary of the date of death.
     (t (calendar-absolute-from-hebrew
         (list death-month death-day year))))))

(defun calendar-goto-hebrew-date (date &optional noecho)
  "Move cursor to Hebrew DATE; echo Hebrew date unless NOECHO is t."
  (interactive
   (let* ((today (calendar-current-date))
          (year (calendar-read
                 "Hebrew calendar year (>3760): "
                 '(lambda (x) (> x 3760))
                 (int-to-string
                  (extract-calendar-year
                   (calendar-hebrew-from-absolute
                    (calendar-absolute-from-gregorian today))))))
          (month-array (if (hebrew-calendar-leap-year-p year)
                           calendar-hebrew-month-name-array-leap-year
                         calendar-hebrew-month-name-array-common-year))
          (completion-ignore-case t)
          ;; XEmacs change, we don't have assoc-string
          (month (cdr (cal-assoc-string
                       (completing-read
                        "Hebrew calendar month name: "
                        (mapcar 'list (append month-array nil))
                        (if (= year 3761)
                            '(lambda (x)
                               (let ((m (cdr
                                         ;; XEmacs change, we don't have assoc-string
                                         (cal-assoc-string
                                          (car x)
                                          (calendar-make-alist month-array)
                                          t))))
                                 (< 0
                                    (calendar-absolute-from-hebrew
                                     (list m
                                           (hebrew-calendar-last-day-of-month
                                            m year)
                                           year))))))
                        t)
                       (calendar-make-alist month-array 1) t)))
          (last (hebrew-calendar-last-day-of-month month year))
          (first (if (and (= year 3761) (= month 10))
                     18 1))
          (day (calendar-read
                (format "Hebrew calendar day (%d-%d): "
                        first last)
                '(lambda (x) (and (<= first x) (<= x last))))))
     (list (list month day year))))
  (calendar-goto-date (calendar-gregorian-from-absolute
                       (calendar-absolute-from-hebrew date)))
  (or noecho (calendar-print-hebrew-date)))

(defun holiday-hebrew (month day string)
  "Holiday on MONTH, DAY (Hebrew) called STRING.
If MONTH, DAY (Hebrew) is visible, the value returned is corresponding
Gregorian date in the form of the list (((month day year) STRING)).  Returns
nil if it is not visible in the current calendar window."
  (if (memq displayed-month;;  This test is only to speed things up a bit;
            (list          ;;  it works fine without the test too.
             (if (< 11 month) (- month 11) (+ month 1))
             (if (< 10 month) (- month 10) (+ month 2))
             (if (<  9 month) (- month  9) (+ month 3))
             (if (<  8 month) (- month  8) (+ month 4))
             (if (<  7 month) (- month  7) (+ month 5))))
      (let ((m1 displayed-month)
            (y1 displayed-year)
            (m2 displayed-month)
            (y2 displayed-year)
            (year))
        (increment-calendar-month m1 y1 -1)
        (increment-calendar-month m2 y2 1)
        (let* ((start-date (calendar-absolute-from-gregorian
                            (list m1 1 y1)))
               (end-date (calendar-absolute-from-gregorian
                          (list m2 (calendar-last-day-of-month m2 y2) y2)))
               (hebrew-start (calendar-hebrew-from-absolute start-date))
               (hebrew-end (calendar-hebrew-from-absolute end-date))
               (hebrew-y1 (extract-calendar-year hebrew-start))
               (hebrew-y2 (extract-calendar-year hebrew-end)))
          (setq year (if (< 6 month) hebrew-y2 hebrew-y1))
          (let ((date (calendar-gregorian-from-absolute
                       (calendar-absolute-from-hebrew
                        (list month day year)))))
            (if (calendar-date-is-visible-p date)
                (list (list date string))))))))

(defun holiday-rosh-hashanah-etc ()
  "List of dates related to Rosh Hashanah, as visible in calendar window."
  (if (or (< displayed-month 8)
          (> displayed-month 11))
      nil;; None of the dates is visible
    (let* ((abs-r-h (calendar-absolute-from-hebrew
                      (list 7 1 (+ displayed-year 3761))))
            (mandatory
             (list
              (list (calendar-gregorian-from-absolute abs-r-h)
                    (format "Rosh HaShanah %d" (+ 3761 displayed-year)))
              (list (calendar-gregorian-from-absolute (+ abs-r-h 9))
                    "Yom Kippur")
              (list (calendar-gregorian-from-absolute (+ abs-r-h 14))
                    "Sukkot")
              (list (calendar-gregorian-from-absolute (+ abs-r-h 21))
                    "Shemini Atzeret")
              (list (calendar-gregorian-from-absolute (+ abs-r-h 22))
                    "Simchat Torah")))
           (optional
            (list
             (list (calendar-gregorian-from-absolute
                    (calendar-dayname-on-or-before 6 (- abs-r-h 4)))
                   "Selichot (night)")
             (list (calendar-gregorian-from-absolute (1- abs-r-h))
                   "Erev Rosh HaShanah")
             (list (calendar-gregorian-from-absolute (1+ abs-r-h))
                   "Rosh HaShanah (second day)")
             (list (calendar-gregorian-from-absolute
                    (if (= (% abs-r-h 7) 4) (+ abs-r-h 3) (+ abs-r-h 2)))
                   "Tzom Gedaliah")
             (list (calendar-gregorian-from-absolute
                    (calendar-dayname-on-or-before 6 (+ 7 abs-r-h)))
                   "Shabbat Shuvah")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 8))
                   "Erev Yom Kippur")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 13))
                   "Erev Sukkot")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 15))
                   "Sukkot (second day)")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 16))
                   "Hol Hamoed Sukkot (first day)")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 17))
                   "Hol Hamoed Sukkot (second day)")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 18))
                   "Hol Hamoed Sukkot (third day)")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 19))
                   "Hol Hamoed Sukkot (fourth day)")
             (list (calendar-gregorian-from-absolute (+ abs-r-h 20))
                   "Hoshanah Rabbah")))
            (output-list
             (filter-visible-calendar-holidays mandatory)))
      (if all-hebrew-calendar-holidays
          (setq output-list
                (append
                 (filter-visible-calendar-holidays optional)
                 output-list)))
      output-list)))

(defun holiday-hanukkah ()
  "List of dates related to Hanukkah, as visible in calendar window."
    (if (memq displayed-month;;  This test is only to speed things up a bit;
              '(10 11 12 1 2));; it works fine without the test too.
        (let ((m displayed-month)
              (y displayed-year))
          (increment-calendar-month m y 1)
          (let* ((h-y (extract-calendar-year
                         (calendar-hebrew-from-absolute
                          (calendar-absolute-from-gregorian
                           (list m (calendar-last-day-of-month m y) y)))))
                 (abs-h (calendar-absolute-from-hebrew (list 9 25 h-y))))
            (filter-visible-calendar-holidays
             (list
              (list (calendar-gregorian-from-absolute (1- abs-h))
                    "Erev Hanukkah")
              (list (calendar-gregorian-from-absolute abs-h)
                    "Hanukkah (first day)")
              (list (calendar-gregorian-from-absolute (1+ abs-h))
                    "Hanukkah (second day)")
              (list (calendar-gregorian-from-absolute (+ abs-h 2))
                    "Hanukkah (third day)")
              (list (calendar-gregorian-from-absolute (+ abs-h 3))
                    "Hanukkah (fourth day)")
              (list (calendar-gregorian-from-absolute (+ abs-h 4))
                    "Hanukkah (fifth day)")
              (list (calendar-gregorian-from-absolute (+ abs-h 5))
                    "Hanukkah (sixth day)")
              (list (calendar-gregorian-from-absolute (+ abs-h 6))
                    "Hanukkah (seventh day)")
              (list (calendar-gregorian-from-absolute (+ abs-h 7))
                    "Hanukkah (eighth day)")))))))

(defun holiday-passover-etc ()
  "List of dates related to Passover, as visible in calendar window."
 (if (< 7 displayed-month)
      nil;; None of the dates is visible
    (let* ((abs-p (calendar-absolute-from-hebrew
                      (list 1 15 (+ displayed-year 3760))))
           (mandatory
            (list
             (list (calendar-gregorian-from-absolute abs-p)
                   "Passover")
             (list (calendar-gregorian-from-absolute (+ abs-p 50))
                   "Shavuot")))
           (optional
            (list
             (list (calendar-gregorian-from-absolute
                    (calendar-dayname-on-or-before 6 (- abs-p 43)))
                   "Shabbat Shekalim")
             (list (calendar-gregorian-from-absolute
                    (calendar-dayname-on-or-before 6 (- abs-p 30)))
                   "Shabbat Zachor")
             (list (calendar-gregorian-from-absolute
                    (if (= (% abs-p 7) 2) (- abs-p 33) (- abs-p 31)))
                   "Fast of Esther")
             (list (calendar-gregorian-from-absolute (- abs-p 31))
                   "Erev Purim")
             (list (calendar-gregorian-from-absolute (- abs-p 30))
                   "Purim")
             (list (calendar-gregorian-from-absolute
                    (if (zerop (% abs-p 7)) (- abs-p 28) (- abs-p 29)))
                   "Shushan Purim")
             (list (calendar-gregorian-from-absolute
                    (- (calendar-dayname-on-or-before 6 (- abs-p 14)) 7))
                   "Shabbat Parah")
             (list (calendar-gregorian-from-absolute
                    (calendar-dayname-on-or-before 6 (- abs-p 14)))
                   "Shabbat HaHodesh")
             (list (calendar-gregorian-from-absolute
                    (calendar-dayname-on-or-before 6 (1- abs-p)))
                   "Shabbat HaGadol")
             (list (calendar-gregorian-from-absolute (1- abs-p))
                   "Erev Passover")
             (list (calendar-gregorian-from-absolute (1+ abs-p))
                   "Passover (second day)")
             (list (calendar-gregorian-from-absolute (+ abs-p 2))
                   "Hol Hamoed Passover (first day)")
             (list (calendar-gregorian-from-absolute (+ abs-p 3))
                   "Hol Hamoed Passover (second day)")
             (list (calendar-gregorian-from-absolute (+ abs-p 4))
                   "Hol Hamoed Passover (third day)")
             (list (calendar-gregorian-from-absolute (+ abs-p 5))
                   "Hol Hamoed Passover (fourth day)")
             (list (calendar-gregorian-from-absolute (+ abs-p 6))
                   "Passover (seventh day)")
             (list (calendar-gregorian-from-absolute (+ abs-p 7))
                   "Passover (eighth day)")
             (list (calendar-gregorian-from-absolute
                    (if (zerop (% (+ abs-p 12) 7))
                        (+ abs-p 13)
                      (+ abs-p 12)))
                   "Yom HaShoah")
             (list (calendar-gregorian-from-absolute
                    (if (zerop (% abs-p 7))
                        (+ abs-p 18)
                      (if (= (% abs-p 7) 6)
                          (+ abs-p 19)
                        (+ abs-p 20))))
                   "Yom HaAtzma'ut")
             (list (calendar-gregorian-from-absolute (+ abs-p 33))
                   "Lag BaOmer")
             (list (calendar-gregorian-from-absolute (+ abs-p 43))
                   "Yom Yerushalaim")
             (list (calendar-gregorian-from-absolute (+ abs-p 49))
                   "Erev Shavuot")
             (list (calendar-gregorian-from-absolute (+ abs-p 51))
                   "Shavuot (second day)")))
           (output-list
             (filter-visible-calendar-holidays mandatory)))
      (if all-hebrew-calendar-holidays
          (setq output-list
                (append
                 (filter-visible-calendar-holidays optional)
                 output-list)))
      output-list)))

(defun holiday-tisha-b-av-etc ()
  "List of dates around Tisha B'Av, as visible in calendar window."
  (if (or (< displayed-month 5)
          (> displayed-month 9))
      nil;; None of the dates is visible
    (let* ((abs-t-a (calendar-absolute-from-hebrew
                      (list 5 9 (+ displayed-year 3760)))))

      (filter-visible-calendar-holidays
       (list
        (list (calendar-gregorian-from-absolute
               (if (= (% abs-t-a 7) 6) (- abs-t-a 20) (- abs-t-a 21)))
              "Tzom Tammuz")
        (list (calendar-gregorian-from-absolute
               (calendar-dayname-on-or-before 6 abs-t-a))
              "Shabbat Hazon")
        (list (calendar-gregorian-from-absolute
               (if (= (% abs-t-a 7) 6) (1+ abs-t-a) abs-t-a))
              "Tisha B'Av")
        (list (calendar-gregorian-from-absolute
               (calendar-dayname-on-or-before 6 (+ abs-t-a 7)))
              "Shabbat Nahamu"))))))

(defun list-hebrew-diary-entries ()
  "Add any Hebrew date entries from the diary file to `diary-entries-list'.
Hebrew date diary entries must be prefaced by `hebrew-diary-entry-symbol'
\(normally an `H').  The same diary date forms govern the style of the Hebrew
calendar entries, except that the Hebrew month names must be spelled in full.
The Hebrew months are numbered from 1 to 13 with Nisan being 1, 12 being
Adar I and 13 being Adar II; you must use `Adar I' if you want Adar of a
common Hebrew year.  If a Hebrew date diary entry begins with a
`diary-nonmarking-symbol', the entry will appear in the diary listing, but will
not be marked in the calendar.  This function is provided for use with the
`nongregorian-diary-listing-hook'."
  (if (< 0 number)
      (let ((buffer-read-only nil)
            (diary-modified (buffer-modified-p))
            (gdate original-date)
            (mark (regexp-quote diary-nonmarking-symbol)))
        (calendar-for-loop i from 1 to number do
           (let* ((d diary-date-forms)
                  (hdate (calendar-hebrew-from-absolute
                          (calendar-absolute-from-gregorian gdate)))
                  (month (extract-calendar-month hdate))
                  (day (extract-calendar-day hdate))
                  (year (extract-calendar-year hdate)))
             (while d
               (let*
                   ((date-form (if (equal (car (car d)) 'backup)
                                   (cdr (car d))
                                 (car d)))
                    (backup (equal (car (car d)) 'backup))
                    (dayname
                     (format "%s\\|%s\\.?"
                             (calendar-day-name gdate)
                             (calendar-day-name gdate 'abbrev)))
                    (calendar-month-name-array
                     calendar-hebrew-month-name-array-leap-year)
                    (monthname
                     (concat
                      "\\*\\|"
                      (calendar-month-name month)))
                    (month (concat "\\*\\|0*" (int-to-string month)))
                    (day (concat "\\*\\|0*" (int-to-string day)))
                    (year
                     (concat
                      "\\*\\|0*" (int-to-string year)
                      (if abbreviated-calendar-year
                          (concat "\\|" (int-to-string (% year 100)))
                        "")))
                    (regexp
                     (concat
                      "\\(\\`\\|\^M\\|\n\\)" mark "?"
                      (regexp-quote hebrew-diary-entry-symbol)
                      "\\("
                      (mapconcat 'eval date-form "\\)\\(")
                      "\\)"))
                    (case-fold-search t))
                 (goto-char (point-min))
                 (while (re-search-forward regexp nil t)
                   (if backup (re-search-backward "\\<" nil t))
                   (if (and (or (char-equal (preceding-char) ?\^M)
                                (char-equal (preceding-char) ?\n))
                            (not (looking-at " \\|\^I")))
                       ;;  Diary entry that consists only of date.
                       (backward-char 1)
                     ;;  Found a nonempty diary entry--make it visible and
                     ;;  add it to the list.
                     (let ((entry-start (point))
                           (date-start))
                       (re-search-backward "\^M\\|\n\\|\\`")
                       (setq date-start (point))
                       (re-search-forward "\^M\\|\n" nil t 2)
                       (while (looking-at " \\|\^I")
                         (re-search-forward "\^M\\|\n" nil t))
                       (backward-char 1)
                       (subst-char-in-region date-start (point) ?\^M ?\n t)
                       (add-to-diary-list
                        gdate
                        (buffer-substring-no-properties entry-start (point))
                        (buffer-substring-no-properties
                         (1+ date-start) (1- entry-start))
                        (copy-marker entry-start))))))
               (setq d (cdr d))))
           (setq gdate
                 (calendar-gregorian-from-absolute
                  (1+ (calendar-absolute-from-gregorian gdate)))))
           (set-buffer-modified-p diary-modified))
        (goto-char (point-min))))

(defun mark-hebrew-calendar-date-pattern (month day year)
  "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR.
A value of 0 in any position is a wildcard."
  (save-excursion
    (set-buffer calendar-buffer)
    (if (and (/= 0 month) (/= 0 day))
        (if (/= 0 year)
            ;; Fully specified Hebrew date.
            (let ((date (calendar-gregorian-from-absolute
                         (calendar-absolute-from-hebrew
                          (list month day year)))))
              (if (calendar-date-is-visible-p date)
                  (mark-visible-calendar-date date)))
          ;; Month and day in any year--this taken from the holiday stuff.
          (if (memq displayed-month;;  This test is only to speed things up a
                    (list          ;;  bit; it works fine without the test too.
                     (if (< 11 month) (- month 11) (+ month 1))
                     (if (< 10 month) (- month 10) (+ month 2))
                     (if (<  9 month) (- month  9) (+ month 3))
                     (if (<  8 month) (- month  8) (+ month 4))
                     (if (<  7 month) (- month  7) (+ month 5))))
              (let ((m1 displayed-month)
                    (y1 displayed-year)
                    (m2 displayed-month)
                    (y2 displayed-year)
                    (year))
                (increment-calendar-month m1 y1 -1)
                (increment-calendar-month m2 y2 1)
                (let* ((start-date (calendar-absolute-from-gregorian
                                    (list m1 1 y1)))
                       (end-date (calendar-absolute-from-gregorian
                                  (list m2
                                        (calendar-last-day-of-month m2 y2)
                                        y2)))
                       (hebrew-start
                        (calendar-hebrew-from-absolute start-date))
                       (hebrew-end (calendar-hebrew-from-absolute end-date))
                       (hebrew-y1 (extract-calendar-year hebrew-start))
                       (hebrew-y2 (extract-calendar-year hebrew-end)))
                  (setq year (if (< 6 month) hebrew-y2 hebrew-y1))
                  (let ((date (calendar-gregorian-from-absolute
                               (calendar-absolute-from-hebrew
                                (list month day year)))))
                    (if (calendar-date-is-visible-p date)
                        (mark-visible-calendar-date date)))))))
      ;; Not one of the simple cases--check all visible dates for match.
      ;; Actually, the following code takes care of ALL of the cases, but
      ;; it's much too slow to be used for the simple (common) cases.
      (let ((m displayed-month)
            (y displayed-year)
            (first-date)
            (last-date))
        (increment-calendar-month m y -1)
        (setq first-date
              (calendar-absolute-from-gregorian
               (list m 1 y)))
        (increment-calendar-month m y 2)
        (setq last-date
              (calendar-absolute-from-gregorian
               (list m (calendar-last-day-of-month m y) y)))
        (calendar-for-loop date from first-date to last-date do
          (let* ((h-date (calendar-hebrew-from-absolute date))
                 (h-month (extract-calendar-month h-date))
                 (h-day (extract-calendar-day h-date))
                 (h-year (extract-calendar-year h-date)))
            (and (or (zerop month)
                     (= month h-month))
                 (or (zerop day)
                     (= day h-day))
                 (or (zerop year)
                     (= year h-year))
                 (mark-visible-calendar-date
                  (calendar-gregorian-from-absolute date)))))))))

(defun mark-hebrew-diary-entries ()
  "Mark days in the calendar window that have Hebrew date diary entries.
Each entry in diary-file (or included files) visible in the calendar window
is marked.  Hebrew date entries are prefaced by a hebrew-diary-entry-symbol
\(normally an `H').  The same diary-date-forms govern the style of the Hebrew
calendar entries, except that the Hebrew month names must be spelled in full.
The Hebrew months are numbered from 1 to 13 with Nisan being 1, 12 being
Adar I and 13 being Adar II; you must use `Adar I' if you want Adar of a
common Hebrew year.  Hebrew date diary entries that begin with a
diary-nonmarking symbol will not be marked in the calendar.  This function
is provided for use as part of the nongregorian-diary-marking-hook."
  (let ((d diary-date-forms))
    (while d
      (let*
          ((date-form (if (equal (car (car d)) 'backup)
                          (cdr (car d))
                        (car d)));; ignore 'backup directive
           (dayname (diary-name-pattern calendar-day-name-array
                                        calendar-day-abbrev-array))
           (monthname
            (format "%s\\|\\*"
                    (diary-name-pattern
                     calendar-hebrew-month-name-array-leap-year)))
           (month "[0-9]+\\|\\*")
           (day "[0-9]+\\|\\*")
           (year "[0-9]+\\|\\*")
           (l (length date-form))
           (d-name-pos (- l (length (memq 'dayname date-form))))
           (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos)))
           (m-name-pos (- l (length (memq 'monthname date-form))))
           (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos)))
           (d-pos (- l (length (memq 'day date-form))))
           (d-pos (if (/= l d-pos) (+ 2 d-pos)))
           (m-pos (- l (length (memq 'month date-form))))
           (m-pos (if (/= l m-pos) (+ 2 m-pos)))
           (y-pos (- l (length (memq 'year date-form))))
           (y-pos (if (/= l y-pos) (+ 2 y-pos)))
           (regexp
            (concat
             "\\(\\`\\|\^M\\|\n\\)"
             (regexp-quote hebrew-diary-entry-symbol)
             "\\("
             (mapconcat 'eval date-form "\\)\\(")
             "\\)"))
           (case-fold-search t))
        (goto-char (point-min))
        (while (re-search-forward regexp nil t)
          (let* ((dd-name
                  (if d-name-pos
                      (buffer-substring
                       (match-beginning d-name-pos)
                       (match-end d-name-pos))))
                 (mm-name
                  (if m-name-pos
                      (buffer-substring
                       (match-beginning m-name-pos)
                       (match-end m-name-pos))))
                 (mm (string-to-number
                      (if m-pos
                          (buffer-substring
                           (match-beginning m-pos)
                           (match-end m-pos))
                        "")))
                 (dd (string-to-number
                      (if d-pos
                          (buffer-substring
                           (match-beginning d-pos)
                           (match-end d-pos))
                        "")))
                 (y-str (if y-pos
                            (buffer-substring
                             (match-beginning y-pos)
                             (match-end y-pos))))
                 (yy (if (not y-str)
                         0
                       (if (and (= (length y-str) 2)
                                abbreviated-calendar-year)
                           (let* ((current-y
                                   (extract-calendar-year
                                    (calendar-hebrew-from-absolute
                                     (calendar-absolute-from-gregorian
                                      (calendar-current-date)))))
                                  (y (+ (string-to-number y-str)
                                        (* 100 (/ current-y 100)))))
                             (if (> (- y current-y) 50)
                                 (- y 100)
                               (if (> (- current-y y) 50)
                                   (+ y 100)
                                 y)))
                         (string-to-number y-str)))))
            (if dd-name
                (mark-calendar-days-named
                 ;; XEmacs change, we don't have assoc-string
                 (cdr (cal-assoc-string dd-name
                                         (calendar-make-alist
                                          calendar-day-name-array
                                          0 nil calendar-day-abbrev-array) t)))
              (if mm-name
                  (setq mm
                        (if (string-equal mm-name "*") 0
                          (cdr
                           ;; XEmacs change, we don't have assoc-string
                           (cal-assoc-string
                            mm-name
                            (calendar-make-alist
                             calendar-hebrew-month-name-array-leap-year) t)))))
              (mark-hebrew-calendar-date-pattern mm dd yy)))))
      (setq d (cdr d)))))

(defun insert-hebrew-diary-entry (arg)
  "Insert a diary entry.
For the Hebrew date corresponding to the date indicated by point.
Prefix arg will make the entry nonmarking."
  (interactive "P")
  (let* ((calendar-month-name-array
          calendar-hebrew-month-name-array-leap-year))
    (make-diary-entry
     (concat
      hebrew-diary-entry-symbol
      (calendar-date-string
       (calendar-hebrew-from-absolute
        (calendar-absolute-from-gregorian
         (calendar-cursor-to-date t)))
       nil t))
     arg)))

(defun insert-monthly-hebrew-diary-entry (arg)
  "Insert a monthly diary entry.
For the day of the Hebrew month corresponding to the date indicated by point.
Prefix arg will make the entry nonmarking."
  (interactive "P")
  (let* ((calendar-date-display-form
          (if european-calendar-style '(day " * ") '("* " day )))
         (calendar-month-name-array
          calendar-hebrew-month-name-array-leap-year))
    (make-diary-entry
     (concat
      hebrew-diary-entry-symbol
      (calendar-date-string
       (calendar-hebrew-from-absolute
        (calendar-absolute-from-gregorian
         (calendar-cursor-to-date t)))))
     arg)))

(defun insert-yearly-hebrew-diary-entry (arg)
  "Insert an annual diary entry.
For the day of the Hebrew year corresponding to the date indicated by point.
Prefix arg will make the entry nonmarking."
  (interactive "P")
  (let* ((calendar-date-display-form
          (if european-calendar-style
              '(day " " monthname)
            '(monthname " " day)))
         (calendar-month-name-array
          calendar-hebrew-month-name-array-leap-year))
    (make-diary-entry
     (concat
      hebrew-diary-entry-symbol
      (calendar-date-string
       (calendar-hebrew-from-absolute
        (calendar-absolute-from-gregorian
         (calendar-cursor-to-date t)))))
     arg)))

;;;###autoload
(defun list-yahrzeit-dates (death-date start-year end-year)
  "List Yahrzeit dates for *Gregorian* DEATH-DATE from START-YEAR to END-YEAR.
When called interactively from the calendar window, the date of death is taken
from the cursor position."
  (interactive
   (let* ((death-date
           (if (equal (current-buffer) (get-buffer calendar-buffer))
               (calendar-cursor-to-date)
             (let* ((today (calendar-current-date))
                    (year (calendar-read
                           "Year of death (>0): "
                           '(lambda (x) (> x 0))
                           (int-to-string (extract-calendar-year today))))
                    (month-array calendar-month-name-array)
                    (completion-ignore-case t)
                    ;; XEmacs change, we don't have assoc-string
                    (month (cdr (cal-assoc-string
                                 (completing-read
                                  "Month of death (name): "
                                  (mapcar 'list (append month-array nil))
                                  nil t)
                                 (calendar-make-alist month-array 1) t)))
                    (last (calendar-last-day-of-month month year))
                    (day (calendar-read
                          (format "Day of death (1-%d): " last)
                          '(lambda (x) (and (< 0 x) (<= x last))))))
               (list month day year))))
          (death-year (extract-calendar-year death-date))
          (start-year (calendar-read
                       (format "Starting year of Yahrzeit table (>%d): "
                               death-year)
                       '(lambda (x) (> x death-year))
                       (int-to-string (1+ death-year))))
          (end-year (calendar-read
                     (format "Ending year of Yahrzeit table (>=%d): "
                             start-year)
                       '(lambda (x) (>= x start-year)))))
   (list death-date start-year end-year)))
  (message "Computing yahrzeits...")
  (let* ((yahrzeit-buffer "*Yahrzeits*")
         (h-date (calendar-hebrew-from-absolute
                  (calendar-absolute-from-gregorian death-date)))
         (h-month (extract-calendar-month h-date))
         (h-day (extract-calendar-day h-date))
         (h-year (extract-calendar-year h-date)))
    (set-buffer (get-buffer-create yahrzeit-buffer))
    (setq buffer-read-only nil)
    (calendar-set-mode-line
     (format "Yahrzeit dates for %s = %s"
             (calendar-date-string death-date)
             (let ((calendar-month-name-array
                    (if (hebrew-calendar-leap-year-p h-year)
                        calendar-hebrew-month-name-array-leap-year
                      calendar-hebrew-month-name-array-common-year)))
               (calendar-date-string h-date nil t))))
    (erase-buffer)
    (goto-char (point-min))
    (calendar-for-loop i from start-year to end-year do
        (insert
         (calendar-date-string
          (calendar-gregorian-from-absolute
           (hebrew-calendar-yahrzeit
            h-date
            (extract-calendar-year
             (calendar-hebrew-from-absolute
              (calendar-absolute-from-gregorian (list 1 1 i))))))) "\n"))
    (goto-char (point-min))
    (set-buffer-modified-p nil)
    (setq buffer-read-only t)
    (display-buffer yahrzeit-buffer)
    (message "Computing yahrzeits...done")))

(defun diary-hebrew-date ()
  "Hebrew calendar equivalent of date diary entry."
  (format "Hebrew date (until sunset): %s" (calendar-hebrew-date-string date)))

(defun diary-omer (&optional mark)
  "Omer count diary entry.
Entry applies if date is within 50 days after Passover.

An optional parameter MARK specifies a face or single-character string to
use when highlighting the day in the calendar."
  (let* ((passover
          (calendar-absolute-from-hebrew
           (list 1 15 (+ (extract-calendar-year date) 3760))))
         (omer (- (calendar-absolute-from-gregorian date) passover))
         (week (/ omer 7))
         (day (% omer 7)))
    (if (and (> omer 0) (< omer 50))
        (cons mark
	      (format "Day %d%s of the omer (until sunset)"
		      omer
		      (if (zerop week)
			  ""
			(format ", that is, %d week%s%s"
				week
				(if (= week 1) "" "s")
				(if (zerop day)
				    ""
				  (format " and %d day%s"
					  day (if (= day 1) "" "s"))))))))))

(defun diary-yahrzeit (death-month death-day death-year &optional mark)
  "Yahrzeit diary entry--entry applies if date is yahrzeit or the day before.
Parameters are DEATH-MONTH, DEATH-DAY, DEATH-YEAR; the diary entry is assumed
to be the name of the person.  Date of death is on the *civil* calendar;
although the date of death is specified by the civil calendar, the proper
Hebrew calendar yahrzeit is determined.  If `european-calendar-style' is t, the
order of the parameters is changed to DEATH-DAY, DEATH-MONTH, DEATH-YEAR.

An optional parameter MARK specifies a face or single-character string to
use when highlighting the day in the calendar."
  (let* ((h-date (calendar-hebrew-from-absolute
                  (calendar-absolute-from-gregorian
                   (if european-calendar-style
                       (list death-day death-month death-year)
		     (list death-month death-day death-year)))))
         (h-month (extract-calendar-month h-date))
         (h-day (extract-calendar-day h-date))
         (h-year (extract-calendar-year h-date))
         (d (calendar-absolute-from-gregorian date))
         (yr (extract-calendar-year (calendar-hebrew-from-absolute d)))
         (diff (- yr h-year))
         (y (hebrew-calendar-yahrzeit h-date yr)))
    (if (and (> diff 0) (or (= y d) (= y (1+ d))))
        (cons mark
	      (format "Yahrzeit of %s%s: %d%s anniversary"
		      entry
		      (if (= y d) "" " (evening)")
		      diff
		      (cond ((= (% diff 10) 1) "st")
			    ((= (% diff 10) 2) "nd")
			    ((= (% diff 10) 3) "rd")
			    (t "th")))))))

(defun diary-rosh-hodesh (&optional mark)
  "Rosh Hodesh diary entry.
Entry applies if date is Rosh Hodesh, the day before, or the Saturday before.

An optional parameter MARK specifies a face or single-character string to
use when highlighting the day in the calendar."
  (let* ((d (calendar-absolute-from-gregorian date))
         (h-date (calendar-hebrew-from-absolute d))
         (h-month (extract-calendar-month h-date))
         (h-day (extract-calendar-day h-date))
         (h-year (extract-calendar-year h-date))
         (leap-year (hebrew-calendar-leap-year-p h-year))
         (last-day (hebrew-calendar-last-day-of-month h-month h-year))
         (h-month-names
          (if leap-year
              calendar-hebrew-month-name-array-leap-year
            calendar-hebrew-month-name-array-common-year))
         (this-month (aref h-month-names (1- h-month)))
         (h-yesterday (extract-calendar-day
                       (calendar-hebrew-from-absolute (1- d)))))
    (if (or (= h-day 30) (and (= h-day 1) (/= h-month 7)))
        (cons mark
	      (format
	       "Rosh Hodesh %s"
	       (if (= h-day 30)
		   (format
		    "%s (first day)"
		    ;; next month must be in the same year since this
		    ;; month can't be the last month of the year since
		    ;; it has 30 days
		    (aref h-month-names h-month))
		 (if (= h-yesterday 30)
		     (format "%s (second day)" this-month)
		   this-month))))
      (if (= (% d 7) 6)	;; Saturday--check for Shabbat Mevarchim
          (cons mark
		(cond ((and (> h-day 22) (/= h-month 6) (= 29 last-day))
		       (format "Mevarchim Rosh Hodesh %s (%s)"
			       (aref h-month-names
				     (if (= h-month
					    (hebrew-calendar-last-month-of-year
					     h-year))
					 0 h-month))
			       (aref calendar-day-name-array (- 29 h-day))))
		      ((and (< h-day 30) (> h-day 22) (= 30 last-day))
		       (format "Mevarchim Rosh Hodesh %s (%s-%s)"
			       (aref h-month-names h-month)
			       (if (= h-day 29)
				   "tomorrow"
				 (aref calendar-day-name-array (- 29 h-day)))
			       (aref calendar-day-name-array
				     (% (- 30 h-day) 7))))))
        (if (and (= h-day 29) (/= h-month 6))
            (cons mark
		  (format "Erev Rosh Hodesh %s"
			  (aref h-month-names
				(if (= h-month
				       (hebrew-calendar-last-month-of-year
					h-year))
				    0 h-month)))))))))

(defvar hebrew-calendar-parashiot-names
["Bereshith"   "Noah"      "Lech L'cha" "Vayera"    "Hayei Sarah" "Toledoth"
 "Vayetze"     "Vayishlah" "Vayeshev"   "Mikketz"   "Vayiggash"   "Vayhi"
 "Shemoth"     "Vaera"     "Bo"         "Beshallah" "Yithro"      "Mishpatim"
 "Terumah"     "Tetzavveh" "Ki Tissa"   "Vayakhel"  "Pekudei"     "Vayikra"
 "Tzav"        "Shemini"   "Tazria"     "Metzora"   "Aharei Moth" "Kedoshim"
 "Emor"        "Behar"     "Behukkotai" "Bemidbar"  "Naso"       "Behaalot'cha"
 "Shelah L'cha" "Korah"    "Hukkath"    "Balak"     "Pinhas"      "Mattoth"
 "Masei"       "Devarim"   "Vaethanan"  "Ekev"      "Reeh"        "Shofetim"
 "Ki Tetze"    "Ki Tavo"   "Nitzavim"   "Vayelech"  "Haazinu"]
  "The names of the parashiot in the Torah.")

(defun hebrew-calendar-parasha-name (p)
  "Name(s) corresponding to parasha P."
  (if (arrayp p);; combined parasha
      (format "%s/%s"
              (aref hebrew-calendar-parashiot-names (aref p 0))
              (aref hebrew-calendar-parashiot-names (aref p 1)))
    (aref hebrew-calendar-parashiot-names p)))

(defun diary-parasha (&optional mark)
  "Parasha diary entry--entry applies if date is a Saturday.

An optional parameter MARK specifies a face or single-character string to
use when highlighting the day in the calendar."
  (let ((d (calendar-absolute-from-gregorian date)))
    (if (= (% d 7) 6) ;;  Saturday
        (let*
            ((h-year (extract-calendar-year
                      (calendar-hebrew-from-absolute d)))
             (rosh-hashanah
              (calendar-absolute-from-hebrew (list 7 1 h-year)))
             (passover
              (calendar-absolute-from-hebrew (list 1 15 h-year)))
             (rosh-hashanah-day
              (aref calendar-day-name-array (% rosh-hashanah 7)))
             (passover-day
              (aref calendar-day-name-array (% passover 7)))
             (long-h (hebrew-calendar-long-heshvan-p h-year))
             (short-k (hebrew-calendar-short-kislev-p h-year))
             (type (cond ((and long-h (not short-k)) "complete")
                         ((and (not long-h) short-k) "incomplete")
                         (t "regular")))
             (year-format
              (symbol-value
               (intern (format "hebrew-calendar-year-%s-%s-%s" ;; keviah
                               rosh-hashanah-day type passover-day))))
             (first-saturday ;; of Hebrew year
              (calendar-dayname-on-or-before 6 (+ 6 rosh-hashanah)))
             (saturday ;; which Saturday of the Hebrew year
              (/ (- d first-saturday) 7))
             (parasha (aref year-format saturday)))
          (if parasha
              (cons mark
		    (format
		     "Parashat %s"
		     (if (listp parasha) ;; Israel differs from diaspora
			 (if (car parasha)
			     (format "%s (diaspora), %s (Israel)"
				     (hebrew-calendar-parasha-name (car parasha))
				     (hebrew-calendar-parasha-name (cdr parasha)))
			   (format "%s (Israel)"
				   (hebrew-calendar-parasha-name (cdr parasha))))
		       (hebrew-calendar-parasha-name parasha)))))))))

;; The seven ordinary year types (keviot)

(defconst hebrew-calendar-year-Saturday-incomplete-Sunday
  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
    43 44 45 46 47 48 49 50]
  "The structure of the parashiot.
Hebrew year starts on Saturday, is `incomplete' (Heshvan and Kislev each have
29 days), and has Passover start on Sunday.")

(defconst hebrew-calendar-year-Saturday-complete-Tuesday
  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
    43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
have 30 days), and has Passover start on Tuesday.")

(defconst hebrew-calendar-year-Monday-incomplete-Tuesday
  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
    43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
have 29 days), and has Passover start on Tuesday.")

(defconst hebrew-calendar-year-Monday-complete-Thursday
  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
   23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
30 days), and has Passover start on Thursday.")

(defconst hebrew-calendar-year-Tuesday-regular-Thursday
  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
   23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
Kislev has 30 days), and has Passover start on Thursday.")

(defconst hebrew-calendar-year-Thursday-regular-Saturday
  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22] 23
   24 nil (nil . 25) (25 . [26 27]) ([26 27] . [28 29]) ([28 29] . 30)
   (30 . 31) ([31 32] . 32) 33 34 35 36 37 38 39 40 [41 42] 43 44 45 46 47 48
   49 50]
  "The structure of the parashiot.
Hebrew year that starts on Thursday, is `regular' (Heshvan has 29 days and
Kislev has 30 days), and has Passover start on Saturday.")

(defconst hebrew-calendar-year-Thursday-complete-Sunday
  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
    43 44 45 46 47 48 49 50]
  "The structure of the parashiot.
Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev each
have 30 days), and has Passover start on Sunday.")

;; The seven leap year types (keviot)

(defconst hebrew-calendar-year-Saturday-incomplete-Tuesday
  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
    23 24 25 26 27 nil 28 29 30 31 32 33 34 35 36 37 38 39 40 [41 42]
    43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Saturday, is `incomplete' (Heshvan and Kislev each
have 29 days), and has Passover start on Tuesday.")

(defconst hebrew-calendar-year-Saturday-complete-Thursday
  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
   23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
have 30 days), and has Passover start on Thursday.")

(defconst hebrew-calendar-year-Monday-incomplete-Thursday
  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
   23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
have 29 days), and has Passover start on Thursday.")

(defconst hebrew-calendar-year-Monday-complete-Saturday
  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
   23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
   (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
   (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
  "The structure of the parashiot.
Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
30 days), and has Passover start on Saturday.")

(defconst hebrew-calendar-year-Tuesday-regular-Saturday
  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
   23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
   (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
   (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
  "The structure of the parashiot.
Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
Kislev has 30 days), and has Passover start on Saturday.")

(defconst hebrew-calendar-year-Thursday-incomplete-Sunday
  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
    23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
    43 44 45 46 47 48 49 50]
  "The structure of the parashiot.
Hebrew year that starts on Thursday, is `incomplete' (Heshvan and Kislev both
have 29 days), and has Passover start on Sunday.")

(defconst hebrew-calendar-year-Thursday-complete-Tuesday
  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
    23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
    43 44 45 46 47 48 49 [50 51]]
  "The structure of the parashiot.
Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev both
have 30 days), and has Passover start on Tuesday.")

(provide 'cal-hebrew)

;;; arch-tag: aaab6718-7712-42ac-a32d-28fe1f944f3c
;;; cal-hebrew.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.