>>> import pytz >>> pytz.timezone('Asia/Hong_Kong') <DstTzInfo 'Asia/Hong_Kong' LMT+7:37:00 STD>
A seven hour and 37 minute offset? This is a little strange, does anyone experience the same issue?
In fact I’m getting different behavior between
import pytz from datetime import datetime hk = pytz.timezone('Asia/Hong_Kong') dt1 = datetime(2012,1,1,tzinfo=hk) dt2 = hk.localize(datetime(2012,1,1)) if dt1 > dt2: print "Why?"
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Answer
Time zones and offsets change over the years. The default zone name and offset delivered when pytz creates a timezone object are the earliest ones available for that zone, and sometimes they can seem kind of strange. When you use localize
to attach the zone to a date, the proper zone name and offset are substituted. Simply using the datetime
constructor to attach the zone to the date doesn’t allow it to adjust properly.