what is the difference between a black tie and white tie event
White tie From the 1920s onward black tie slowly replaced white tie as the default evening wear for important events, so that by the 21st century white tie had become rare. White tie nowadays tends to be reserved for special ceremonies—especially state dinners—and a very select group of social events such as the Al Smith Memorial Dinner in New York, the Commemoration balls at Oxford University, certain May Balls at Cambridge University, the June ball at Durham University, the Christmas ball at Buckingham Palace, dinners of certain American hereditary societies, and very formal weddings. The Vienna Opera Ball and the Nobel Prize ceremony are white tie events, and some European universities retain it as the dress code for doctoral conferment ceremonies.
Six Nations Championship Prior to 1994, teams equal on match points shared the championship. Since then, ties have been broken by considering the points difference of the teams. The rules of the championship further provide that if teams tie on both match points and points difference, the team that scored the most tries wins the championship. Were this decider to be a tie, the tying teams would share the championship.[4] To date, however, match points and points difference have been sufficient to decide the championship.