Internal Program Version: pytz  2023.3

World timezone definitions, modern and historical

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

http://pypi.python.org/pypi/pytz