Shims to help you safely remove pytz

 pytz has served the Python community well for many years, but it is no longer
 the best option for providing time zones. pytz has a non-standard interface
 that is very easy to misuse; this interface was necessary when pytz was
 created, because datetime had no way to represent ambiguous datetimes, but
 this was solved in Python 3.6, which added a fold attribute to datetimes in
 PEP 495. With the addition of the zoneinfo module in Python 3.9 (PEP 615),
 there has never been a better time to migrate away from pytz.
 .
 However, since pytz time zones are used very differently from a standard
 tzinfo, and many libraries have built pytz zones into their standard time zone
 interface (and thus may have users relying on the existence of the localize and
 normalize methods); this library provides shim classes that are compatible with
 both PEP 495 and pytz's interface, to make it easier for libraries to deprecate
 pytz.