If you’ve ever thought that a party of groomsmen wearing black suits on a sunny day in the park looked off-kilter, you’d be correct. Black tie is evening wear, though it can be worn to, say, an afternoon event if the festivities wind up in the evening. If an invite incorrectly indicates a black tie dress code for a daytime event, however, it’s still polite to attend in a tuxedo. Just be quietly grateful that you have a better idea of what constitutes proper formal wear etiquette than most and enjoy the soiree.