TimeZone Field for DRF

timezone_field.py

import pytz
import six


class TimezoneField(serializers.Field):

    def to_representation(self, obj):
        return six.text_type(obj)

    def to_internal_value(self, time_zone):
        try:
            return pytz.timezone(str(time_zone))
        except pytz.UnknownTimeZoneError:
            raise serializers.ValidationError(
                "Unknown time zone: '%s'" % time_zone
            )