How do you convert a naive datetime to DST-aware datetime in Python?

Question

I\'m currently working on the backend for a calendaring system that returns naive Python datetimes. The way the front end works is the user creates various calendar events,

Answer 1

Pytz's localize function can do this: http://pytz.sourceforge.net/#localized-times-and-date-arithmetic

from datetime import datetime
import pytz    

tz = pytz.timezone('US/Pacific')
naive_dt = datetime(2020, 10, 5, 15, 0, 0) 
utc_dt = tz.localize(naive_dt, is_dst=None).astimezone(pytz.utc)
# -> 2020-10-05 22:00:00+00:00