You will find people from wearing formal wear, Tux & Formal dress on Formal Nights, to people that don’t choose to dress up. The term Formal Night applies to all Princess Ships & cruises. You will never be overdressed. FYI…If Princess made dinning in the Main Dinning Room a must to be wearing formal wear, the dinning room, I feel would be fairly empty plus what terms would be used for formal wear?. The term “Formal Night” has never been in-forced, & I’ve been on 37 cruises with Princess.
Tom😀