'Get date and look whether it is a holiday.'

@asyncio.coroutine
def async_update(self):

    self._state = False
    day = (datetime.datetime.today().isoweekday() - 1)
    day_of_week = day_to_string(day)
    if self.is_include(day_of_week, dt_util.now()):
        self._state = True
    if self.is_exclude(day_of_week, dt_util.now()):
        self._state = False
