def METHOD_NAME(start: datetime):
    m = start.month
    y = start.year - 1900
    offset = 1 if m == 2 else 0
    year = int((y - offset) * 365.25)
    month = int(((m + 1) + (offset * 12)) * 30.6001)
    return round(14956 + start.day + month + year)