def METHOD_NAME(
    date_: date
) -> datetime:
    """
    Returns the start of the day
    >>> jan_1 = date(2000, 1, 1)
    >>> new_year = midnight_starting(jan_1)
    >>> new_year.isoformat()
    '2000-01-01T00:00:00'
    """
    return datetime(date_.year, date_.month, date_.day)