'Wrapper on _schedule_days: return the beginning/ending datetime of
a days scheduling.'

@api.multi
def schedule_days_get_date(self, days, day_date=None, compute_leaves=False, resource_id=None, default_interval=None):

    res = self._schedule_days(days, day_date, compute_leaves, resource_id, default_interval)
    return ((res and res[(-1)][1]) or False)
