Yes, there are regions for which local time is offset by n
hours and 30 minutes, or n hours and 15 minutes.
There have been *extensive* discussions about representing
time in the header-people mailing list over the years. There is an
international standard! For example, RFC1505 specifies:
DD Mon YYYY HH:MM:SS.FFFFFF [+-]HHMMSS
I don't like this for log files, because it's harder to sample
and sort than something simple like:
YYYYMMDD.HHMMSS.FFFFFF+-HHMMSS (with appropriate fields optional,
etc.)
Craig Milo Rogers