What happens in Vegas stays in Vegas. Although many are aware of this expression, very few know where it comes from. Bugsy Siegel, a millionaire, opened a hotel on December 26, 1946 in Las Vegas called the Pink Flamingo Hotel and Casino. With its casino and many different shows, like Frank Sinatra, many people visited the hotel, giving rise to the expression above. December 26th is of importance for several other reasons. It is on this day, in 1825 that the Erie Canal is officially opened, and the first time William Shakespeare's King Lear is performed in 1606. In addition, Kwanza was first celebrated on December 26, 1966. To learn more, watch the This Day in History video: December 26th.