A Guide To Social Dress Codes for Men
If you request formal attire on an invitation (and you don’t belong to an extremely wealthy and upper class set), understand that you’re probably asking the majority of your guests to go through the rental process.Formal wear for men changes depending on the time of day: in daylight hours, it means morning dress with a tailcoat and vest, while at night it means white tie.
Both of these are extremely strict dress codes. It would be unusual (and a bit presumptuous) to request full formal attire for a personal event. Most white-tie affairs are diplomatic events, or high-formality award ceremonies and the occasional British sporting event.