No date: Add highlighting for Chinese months and days

[jc86035]

In Chinese (and Japanese), 2001年15日1月 is 15 January 2001 (where 日 is day, 月 is month and 年 is year; months do not have names and are numbered). However, this is not currently recognized in the game.

[Waldir Pimenta]

Duplicate of #63.