datetime - Converting time zone in Python

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65672049/converting-time-zone-in-python

Answer 1

Assuming your string represents Unix time / seconds since 1970-1-1, it refers to UTC. You can convert it to datetime like

from datetime import datetime, timezone

s = '1346114717'
dt = datetime.fromtimestamp(int(s), tz=timezone.utc)

print(dt.isoformat())
# 2012-08-28T00:45:17+00:00

Note that if you don't supply a time zone, the resulting datetime object will be naive, i.e. does not "know" of a time zone. Python will treat it as local time by default (your machine's OS setting).

To convert to US/Pacific time, you can use zoneinfo from Python 3.9's standard lib:

from zoneinfo import ZoneInfo

dt_pacific = dt.astimezone(ZoneInfo('US/Pacific'))
print(dt_pacific.isoformat())
# 2012-08-27T17:45:17-07:00

or use dateutil with older versions of Python:

from dateutil.tz import gettz # pip install python-dateutil

dt_pacific = dt.astimezone(gettz('US/Pacific'))
print(dt_pacific.isoformat())
# 2012-08-27T17:45:17-07:00