While it's typically ideal to sleep during the night in Kingdom Come: Deliverance 2 — doing so is necessary in order to restore Henry's energy at the end of each in-game day — there are times where you'll need to be awake and active at night to complete certain quests. Nighttime hours are also when most NPCs are asleep in their homes, making them the best time to sneakily commit thieveries or murders if you're all about the criminal lifestyle.
Regardless of why you're awake when the sun goes down, though, having a torch handy is important. It's illegal to walk around towns and settlements at night without one, and you'll want to be able to pull one out if guards spot you lurking in the dark. If you don't, they'll start acting suspicious and will eventually arrest you on the spot. Also, torches are useful whenever you find yourself exploring dark interiors like basements and cellars.
