Function localize

celery/utils/time.py:360–369

Convert aware :class:`~datetime.datetime` to another timezone. Using a ZoneInfo timezone will give the most flexibility in terms of ambiguous DST handling.

(dt: datetime, tz: tzinfo)

def localize(dt: datetime, tz: tzinfo) -> datetime:
    """Convert aware :class:`~datetime.datetime` to another timezone.

    Using a ZoneInfo timezone will give the most flexibility in terms of ambiguous DST handling.
    """
    if is_naive(dt):  # Ensure timezone aware datetime
        dt = make_aware(dt, tz)
    if dt.tzinfo == ZoneInfo("UTC"):
        dt = dt.astimezone(tz)  # Always safe to call astimezone on utc zones
    return dt


def to_utc(dt: datetime) -> datetime: