Confused by datetime.datetime and timezone

Asked May 06 '22 at 15:36

Active May 06 '22 at 15:36

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I'm trying to use timezones for input to pysolar (but my question seems to be pysolar-independent).

It's 5:33pm right now. If I type

datetime.datetime.now(pytz.timezone("Europe/Paris"))

I get as output

datetime.datetime(2022, 5, 6, 17, 33, 0, 781951, tzinfo=<DstTzInfo 'Europe/Paris' CEST+2:00:00 DST>)

However, if I type

datetime.datetime(2022,5,6,17,33,0,0,tzinfo=pytz.timezone("Europe/Paris"))

I get

datetime.datetime(2022, 5, 6, 17, 33, tzinfo=<DstTzInfo 'Europe/Paris' LMT+0:09:00 STD>)

which seems to be almost 2 hours off (but not quite)! What am I getting wrong? What should I be typing the second time so that I get the "correct" answer, i.e., that from the first time (with datetime.datetime.now)?

asked May 06 '22 at 15:36

H A Helfgott

I vaguely recall that you should use `pytz.timezone("Europe/Paris").localize(dt)` with a naive datetime object `dt`, instead of passing the timezone to the `tzinfo`. Not sure though since I haven't done much work with timezone-aware datetimes. – Pranav Hosangadi May 06 '22 at 15:41
I get "NameError: name 'dt' is not defined" – H A Helfgott May 06 '22 at 15:42
Well `dt` is your naive datetime object `datetime.datetime(2022,5,6,17,33,0,0)`. – Pranav Hosangadi May 06 '22 at 15:43
See https://stackoverflow.com/a/43127752/843953 – Pranav Hosangadi May 06 '22 at 15:45
Oh, I see. ```pytz.timezone("Europe/Paris").localize(datetime.datetime(2022,5,6,17,33,0,0))``` – H A Helfgott May 06 '22 at 15:45

Confused by datetime.datetime and timezone

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