fails:Date#commercial creates a Date for the day of Julian calendar reform in Italy by default
fails:Date#commercial Creates a Date for the friday in the year and week given
fails:Date#valid_commercial? should be able to determine if the date is a valid commercial date
fails:Date#valid_commercial? should be able to handle negative week and day numbers
fails:"Date#commercial creates a Date for the day of Julian calendar reform in Italy by default"
fails:"Date#commercial Creates a Date for the friday in the year and week given"
fails:"Date#valid_commercial? should be able to determine if the date is a valid commercial date"
fails:"Date#valid_commercial? should be able to handle negative week and day numbers"
