def dayFormat(day: int) -> str:
    """
    Formats a (0-6) weekday number as a full week day name, according to the current locale.
    For example: dayFormat(0) -> "Sunday".
    """
    days = [
        "Sunday",
        "Monday",
        "Tuesday",
        "Wednesday",
        "Thursday",
        "Friday",
        "Saturday",
    ]
    return days[day % 7]