If you decide to put your wedding date in your announcement, make sure that you have already confirmed your location and ceremony site. You may be surprised that many places are booked months, even a year in advance, and you don't want to make unnecessary last minute changes.
Warning! You have announced to the world a date on which you will not be home. Ask someone to stay home during the wedding festivities. (Home have been broken into during wedding celebrations and we have learned from the police that it is not unusual.) Take precautions.