Apache and CLF time stamps look like they are UTC time stamps in reports if UTCOffset is not set

[StoneSteps]

Log files with time stamps in local time are adjusted to a new local time zone using UTCOffset and if this value is not set in the configuration, the resulting time appears as if it is UTC time, except that if DST ranges are configured, the time will be adjusted for DST when in the specified range.

For example, if the time in the log is 20:00 UTC+2 and UTCOffset is set to UTC-5, then the reported time will be 13:00.

[StoneSteps]

Local time in Apache and CLF logs will not be adjusted using UTCOffset unless UTCTime is set to yes.

Similarly, UTC time in IIS/W3C logs will not be adjusted using UTCOffset unless UTCTime is set to no.