def to_utc_datetime(self, value):
        """
        from value to datetime with tzinfo format (datetime.datetime instance)
        """
        value = self.to_naive_datetime(value)

        if timezone.is_naive(value):
            value = timezone.make_aware(value, timezone.utc)
        else:
            value = timezone.localtime(value, timezone.utc)
        return value
from value to datetime with tzinfo format (datetime.datetime instance)