middleware.py

class DynamicTimeZoneMiddleware:

    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        dynamic_settings = gpr.manager()
        try:
            time_zone_name = dynamic_settings["main_settings__time_zone"]
        except KeyError:
            time_zone_name = settings.TIME_ZONE
        timezone.activate(pytz.timezone(time_zone_name))
        result = self.get_response(request)
        timezone.deactivate()
        return result