icalendar.timezone.equivalent_timezone_ids module

This module helps identifying the timezone ids and where they differ.

The algorithm: We use the tzname and the utcoffset for each hour from 1970 - 2030. We make a big map. If they are equivalent, they are equivalent within the time that is mostly used.

You can regenerate the information from this module.

See also: - https://stackoverflow.com/questions/79171631/how-do-i-determine-whether-a-zoneinfo-is-an-alias/79171734#79171734

Run this module:

python -m icalendar.timezone.equivalent_timezone_ids

icalendar.timezone.equivalent_timezone_ids.main(create_timezones: list[Callable[[str], tzinfo]], name: str)

Generate a lookup table for timezone information if unknown timezones.

We cannot create one lookup for all because they seem to be all equivalent if we mix timezone implementations.