What's the Longest Poker Session You've Played?

My longest was around 7 hours exhausting but fun. What's the longest session you've ever had, and how did you manage it?

about 16 hours, didnt plan on it, but got very deep on final 3 tournaments, two final tables, one win, one 3 place and one 11 place

When I play MTTs, I plan my schedule so that my session doesn’t last longer than about eight hours. Anything beyond that and my focus starts to fade, my mind just turns dull, decisions get slower, and I stop thinking clearly. I’ve found that maintaining a shorter, well-structured grind is way more valuable than trying to push through fatigue. Quality volume beats quantity every time, especially in tournaments where one small lapse can cost everything.

in 1 tournament at 12h, in PS , in session at around 18h because of the different times of the sites (good tournaments that start very late and I started the session very early)