def _date_to_str(self, dt: datetime.date, fmt="%Y-%m-%dT%H:%M:%SZ"):
if isinstance(dt, datetime.datetime):
if not dt.tzinfo:
dt = self.timezone.localize(dt)
dt = dt.astimezone(self.timezone)
elif isinstance(dt, datetime.date):
dt = datetime.datetime(year=dt.year,
month=dt.month,
day=dt.day,
tzinfo=self.timezone)
return dt.strftime(fmt)
def to_utc(value: date) -> date:
if isinstance(value, datetime):
return value.astimezone(timezone.utc).replace(tzinfo=None)
return value
