There is a known bug when passing a timezone object to datetime constructor https://bytes.com/topic/python/answers/676275-pytz-giving-incorrect-offset-timezone
2.4.10
Rolled back the change on SWS_TIMEZONE (still using pytz)
2.4.9
Python 3.10, fix deprecation, eliminate pytz
2.4.8
Adds new week of term methods to get the calendar week vs the existing methods that calculate number of 7 day periods.