[Python-Dev] Status on PEP-431 Timezones

[Akira Li]

Isaac Schwabacher <ischwabacher at wisc.edu> writes:
> ...
>
> I know that you can do datetime.now(tz), and you can do datetime(2013,
> 11, 3, 1, 30, tzinfo=zoneinfo('America/Chicago')), but not being able
> to add a time zone to an existing naive datetime is painful (and
> strptime doesn't even let you pass in a time zone). 

`.now(tz)` is correct. `datetime(..., tzinfo=tz)`) is wrong: if tz is a
pytz timezone then you may get a wrong tzinfo (LMT), you should use
`tz.localize(naive_dt, is_dst=False|True|None)` instead.

> ...