On Fri, May 20, 2011 at 10:22 AM, wrote: > I think you are looking for this... > > http://en.wikipedia.org/wiki/Tz_database > > Might be a bit much for a PIC... but timezones & DST are complex (and > changing...US/Canada changed the rules a few years ago). > Ah, that is why I kept seeing the tzdata package under Linux Ubuntu to change again and again. I think this idea may not helpful after all and qui= te some countries have already got rid of DST (summer time) scheme. http://en.wikipedia.org/wiki/Daylight_saving_time --=20 Xiaofan --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .