Many couples choose to get married on numerically interesting dates, such as 10/10/10 or 9/10/11. There is no real luck associated with that, but can make it easier for people to remember your wedding date (and for you to recall your anniversary in the future). Just remember that you aren't the only ones that think this is clever, and your friends may be faced with having to choose between weddings on such a popular day. When you start searching for vendors such as wedding planners and ceremony venues, you should be able to get an idea of how popular this date is going to be in your area. If booking vendors looks like it may become more difficult, and you haven't sent your save-the-dates yet, consider whether or not this date is very important to you.