def METHOD_NAME(self, name) -> Optional[date]:
    """
    Add Pchum Ben.
    Also known as "Prachum Bandar".
    This concides with the 15th Waning Day (New Moon) of Month 10 in
    Thai Lunar Calendar.
    https://en.wikipedia.org/wiki/Pchum_Ben
    """
    return self._add_thai_calendar_holiday(
        name, self._thai_calendar.pchum_ben_date(self._year)
    )