A lot of couples (usually the bride) schedule their weddings on days like this.
The reason? Many say it's simply a good luck date, but I believe it's so their husbands will remember the date ;>).
The 21st century has had several dates like today for weddings. Remember that Saturday in 2007, lucky 7/7/7, when reportedly 65,000 couples got married. And many are planned for today, it's a Tuesday but it's also 11/12/13.
Those who miss that sequential date have one last chance this century for a cool number next year on 12/13/14.
The next similar "lucky date" is 1/2/3 over a century from now.