Breath of the Wild has a periodic Blood Moon event that triggers every few days. Moon rises and turns red, ominous music builds up for a bit, evil smoke starts swirling everywhere, and eventually a cutscene triggers depicting monsters respawning. Functionally, it respawns all enemies and loose items in the world and resets them to their default state.
The part I think is neat is that the event is utilized as an emergency garbage collection. If the game starts to get too close to its maximum RAM usage and is risking an out-of-memory crash, it will trigger a special Blood Moon event on the spot to reset everything to default. Some people call these "Panic Blood Moons", and they're pretty noticeable because they fast-forward through the buildup, and can be triggered at any point, even during the day. You're unlikely to see it on a normal playthrough though, unless you cover a lot of the map in a short amount of time, causing too many things to spawn.