What is the proper timing to put on your invitation. For instance, if you expect your ceremony to START at 5;30, would you write 5:30 or like 5. I'm just concerned about people trying to walk in during the processional. (especially cause FIs extended family runs REALLY REALLY I'm talking 2 hours sometimes, late), and I dont want someone trying to come in and sit down during the ceremony and cause a lot of commotion.