def METHOD_NAME(dummy_event, tz, start_time, end_time, start_date, end_date, days):
    start_dt = datetime.combine(start_date, start_time)
    end_dt = datetime.combine(end_date, end_time)
    tzinfo = pytz.timezone(tz)
    dummy_event.start_dt = tzinfo.localize(start_dt)
    dummy_event.end_dt = tzinfo.localize(end_dt)
    all_days = list(dummy_event.iter_days())
    assert all_days[0] == days[0]
    assert all_days[-1] == days[-1]