pytz: pytz (Python world timezone definitions, modern and historical)
pytz: 
pytz: pytz brings the Olson tz database into Python. This library allows
pytz: accurate and cross platform timezone calculations using Python 2.3 or
pytz: higher. It also solves the issue of ambiguous times at the end of
pytz: daylight savings, which you can read more about in the Python Library
pytz: Reference (datetime.tzinfo).
pytz: 
pytz: Amost all of the Olson timezones are supported.
pytz: 
pytz: