Last year, no one wanted to have a baby on 6/6/06. This year, everyone wants to get married on 7/7/07.
[W]edding planners and venues have reported a startling rise in the number of couples who have booked weddings — especially in Las Vegas — on July 7, 2007, many of them having done so in the belief that 7-7-07 is a date with luck written all over it. [Link]
