"The Day That Never Comes" is an extremely rare and spooky glitch that has only been reported by a handful of players. When this phenomenon occurs, the sun will set normally around 19:00 to 22:00 and night falls— and lasts for 24 hours. The moon will cycle three times, but the sun will not rise.
Interestingly, all reports of this glitch are claimed to have occurred on a Saturday. In addition, NPCs will behave bizarrely, such as walking in circles, avoiding each other, or casually starting fights with the player. Animals will freeze in place, and birds will fly in a tornado pattern. Incomplete NPC Random Events will not activate.