Fix issue with DST starting/ending causing overlaps/gaps #5266
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By looping through each event and using normalize, the tzinfo might change DST status. We can check for this change in DST status to adjust the end date either forward or backward, depending if DST stopped or started.
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What this PR does
This older version of recurring_ical_events does not call the pytz .normalize() function, which can cause some invalid datetime objects to return when a DST swap happens. For example: Nov 3, 2024 9:00 AM CDT instead of the correct 8:00 AM CST). By calling tz.normalize on the end date and checking if the time zone information changed, we can detect when DST starts/stops and adjust the end date accordingly.
Which issue(s) this PR closes
Closes #5247
Checklist
pr:no public docsPR label added if not required)release:). These labels dictate how your PR willshow up in the autogenerated release notes.