If holiday falls on Sunday or Saturday,
    use day thereafter (Monday) instead.
    Needed for holidays such as Christmas observation in Europe

def weekend_to_monday(dt):
    """
    If holiday falls on Sunday or Saturday,
    use day thereafter (Monday) instead.
    Needed for holidays such as Christmas observation in Europe
    """
    if dt.weekday() == 6:
        return dt + timedelta(1)
    elif dt.weekday() == 5:
        return dt + timedelta(2)
    return dt