One of the most important things to remember when choosing an outfit for a formal event is that you should be comfortable in it. You’ll likely be spending a lot of time in this outfit, so you don’t want something that’s too tight or restrictive. Make sure you have plenty of time to try on different outfits and find the one that’s just right. You should also bring a backup outfit with you so that you have something else to wear if your first choice isn’t working out.