def categorizeTypeOfDay(x):
    """
    This function returns either the day provided is a week day or a weekend.
    :param x: string value of day
    :return: string
    """
    if x == 'Monday':
        return 'Week Day'
    elif x == 'Tuesday':
        return 'Week Day'
    elif x == 'Wednesday':
        return 'Week Day'
    elif x == 'Thursday':
        return 'Week Day'
    elif x == 'Friday':
        return 'Week Day'
    else:
        return 'Weekend'