Calmer Nights

Calmer Nights works by changing how hostile mobs are spawned. A config file lets a server owner set the spawn chance and maximum count for each mob, add or remove mobs from the list, choose whether a mob spawns only at night or at any time, and cap how many hostile mobs may exist in the world at once. Spawns can be spread out with a cooldown between attempts and a limit per cooldown window, and the mod automatically prevents mob overcrowding. Mods such as Only Zombies Spawn or Peaceful Nights offer narrower or differently built approaches to the same goal.

The mod supports modded mobs, identified by their namespace and ID, such as minecraft:zombie. Each entry in the custom list takes a namespace and entity, a spawn chance and a night-only flag, so rules can be fine-tuned without writing code. A debug mode can print spawn messages to chat for checking, and the calmernights reload command applies config changes without restarting. Fabric API is required. Players and servers both need the mod on their side, and files are published for 11 release versions, 1.16.5 – 1.21.10. The code is under All rights reserved, so the mod is not open source.