As people began learning how to tie a tie to look like his, they called it the Windsor. Even the English military got into it, as the Royal Air Force adopted the knot.

Black tie optional: This is one of those times when people say one thing and mean the other; they are just being nice. It usually means they want you to wear a tuxedo, so do it.

Zoë Kravitz, Steve Lacy, Jim Jarmusch, and more suited up to see Anthony Vaccarello’s Fall-Winter 2025 Saint Laurent collection at Paris Fashion Week.