A new Letterboxd Showdown:

"One day. One night. The clock is ticking and we want your best “finite timeframe” films. Any genre, any era, one rule: all of the action depicted in the film takes place in less than 24 hours. tag with showdown:24hours"

I wasn't sure about some of these movies, but I hope I got it right. My list was pretty long in the beginning, so it's no Top10 but a Top17. I didn't know what to cut from it. :)