When I was fourteen, my family visited a naturist camp managed by a college friend of my mother's. We were there a total of eight days, and I never wore a stitch the whole time. The nights were warm, so even then there was no need to wear anything.
No one was home for a long weekend, I was naked for 3 1/2 days, If you want to count putting on a tshirt and shorts to go get the mail for 45 seconds, then I wasn't.
I few hours, I've done some spritial practices like forest bathing nude, I hiked threw the forest then mediated on the forest floor competently naked
Before COVID, maybe 24 hours. After COVID, 5 days. But during lockdown, I remained naked for 24 days in a row. Any time we needed anything, my wife would venture out. She needed to feel normal. I didn’t want to break my streak.
I got a full six days in once upon a time. Family trying to drag me into some drama so I hit the road for a couple of weeks, hung around in the south of France. Got a last minute reservation in at the naturist quarter in cap d'agde for a week of that. Interesting experience, being able to do a whole daily routine, shopping included with no clothes on. Very nice beach too. The focus on nightlife and the active swinger scene in the quarter means a return is not for me (no judgement on those it would be for), but I'd love to have that experience again somewhere. Maybe even more there for an extended period. If I hit the lottery jackpot, I'd be looking at the ile du Levant for a retirement home for sure.