I have a friend who is a professional violinist. He plays in a quartet, as well as taking solo gigs. He has a full array of formal and semi-formal wear for day and evening. He once get an invitation to a wedding that said “formal attire,” on it. He decided against wearing white tie and tails, because he didn’t think most people actually meant that when they said “formal,” because he didn’t see guests dressed like that very often at occasion where he played, even when he was specifically asked to wear tails. So he wore a tux and black tie, with a striped vest for a little whimsy.
He got accosted by the bride when he got there, and accused also of essentially trying to upstage the groom. He didn’t even bother to try to explain that a tux wasn’t even the most formal of attire. He went back to his car, drove to the nearest store-- a Walmart, or something, bought a straight tie, and returned. Nothing more was said.
He told me it was one of those weddings where the groom was in black tie and vest, while the groomsmen were in colored ties and cummerbunds that matched the dresses of the bridesmaids they escorted-- whose dresses were identical, except for being different colors.
I asked what the other men were wearing, and he said mostly business suits, except for a couple of clods in dockers and sports coats, and the groom’s father, who was in a military dress uniform. He learned something about what some people consider “formal.”
Me, I once got lectured for wearing regular work clothes on “casual Friday.” All the jeans I owned (and this is still true), are the loose-fitting type with cargo pockets, and at the time were all pretty worn. Also, the dress code in this place wasn’t very strict, so everyday work clothes could be dockers and a Polo shirt, or a broomstick skirt and a very casual sweater. It wasn’t called “denim Friday”; it was called “casual Friday.” But, I went out and bought a pair of nice Levis, that weren’t loose-fit, carpenter, or cargo. Wore them to work every goddam Friday. Never any other time. They weren’t as comfortable as most of my other work clothes.