A list of surprises, using datetimes with the python ecosystem

datetime_surprises.py

from datetime import UTC
from zoneinfo import ZoneInfo

TZ_PARIS = ZoneInfo("Europe/Paris")
TZ_UTC = UTC

# datetime equality is bugged
datetime(2023, 10, 29, 2, 30, fold=0, tzinfo=TZ_PARIS) == datetime(2023, 10, 29, 2, 30, fold=1, tzinfo=TZ_PARIS) # True
datetime(2023, 10, 29, 2, 30, fold=0, tzinfo=TZ_PARIS).timestamp() == datetime(2023, 10, 29, 2, 30, fold=1, tzinfo=TZ_PARIS).timestamp() # False

# good literature:
# https://blog.ganssle.io/articles/2018/02/aware-datetime-arithmetic.html