def father(year=None):
    """
    the 3rd Sunday in June
    :param year: int
    :return: Father's day
    """
    june_first = datetime.date(_year, 6, 1) if not year else datetime.date(int(year), 6, 1)
    weekday_seq = june_first.weekday()
    return datetime.date(june_first.year, 6, (21 - weekday_seq))
dataset/ETHPy150Open shinux/PyTime/pytime/pytime.py/father/original