StayNight - Eternal Night Mod

Overview StayNight is a lightweight Minecraft mod that permanently fixes the time in your world at midnight (18000 ticks), creating an atmosphere of eternal night. The perfect solution for horror maps, vampire role-playing games, or for players who prefer the mysterious atmosphere of darkness. The mod seamlessly overrides time mechanics on both the client and server sides, maintaining eternal night.

Key Features

🌙 True Eternal Night

• All worlds remain at 18000 ticks (midnight) regardless of time commands, sleep attempts, or natural cycles
• Works in both single-player and multiplayer modes

🛡️ Complete Time Control

• Intercepts time setting logic in:
  • World data (PrimaryLevelData, DerivedLevelData)
  • Client/server level handlers (ClientLevel, ServerLevel)
  • Network time synchronization packets (ClientboundSetTimePacket)
• Blocks all attempts to change the time of day

⚡ Zero Configuration Starts working immediately after installation - requires no configuration or commands!

🧩 Compatibility Compatible with most mods that do not directly alter time mechanics.

Technical Implementation

The mod uses bytecode manipulation to:

1. Override Time Setters

   @ModifyVariable(method = "setDayTime", at = @At("HEAD"), argsOnly = true)
   private long stayNight(long dayTime) {
    return 18000L; // Always force midnight
   }

2. Hijack Time Getters

   @Inject(method = "getDayTime", at = @At("HEAD"), cancellable = true)
   private void stayNight(CallbackInfoReturnable<Long> cir) {
    cir.setReturnValue(18000L); // Always report midnight
   }

3. Patch Network Synchronization Manipulates ClientboundSetTimePacket to prevent servers from overriding the eternal night.

Use Cases

• Horror and adventure maps requiring permanent darkness
• Servers for vampire and fantasy role-playing games
• Atmospheric builds showcasing night lighting
• Gameplay challenges without day-night cycles