Make your nights count.
A Minecraft Fabric mod and Datapack that accelerates crop, tree, and animal growth while players sleep.

📖 Description

Overnight makes sleeping in Minecraft actually meaningful. Instead of just skipping the night, your crops, saplings, and baby animals continue growing while you rest — as if time truly passed.

How It Works

• Plants & Trees: When a player sleeps, the randomTickSpeed is temporarily multiplied by your configured rate (default 100x), causing all crops, saplings, sugar cane, cactus, bamboo, nether wart, and other vegetation to grow rapidly during the brief sleep window.
• Animals: Baby animals have their Age tag accelerated each tick during sleep, making them grow toward adulthood faster (default 100x, but disabled by default).
• Fire Safety: doFireTick is automatically disabled during sleep acceleration and restored when players wake up, preventing unwanted fire spread.
• Clean Recovery: If the server reloads mid-sleep (/reload), original gamerules are automatically restored.

What's Affected by Plant Growth?

All vegetation that uses random ticks, including:

What's Affected by Animal Growth?

All breedable baby animals in the #overnight:growable_animals tag:

Cow, Mooshroom, Sheep, Pig, Chicken, Horse, Donkey, Mule, Llama, Rabbit, Fox, Turtle, Panda, Polar Bear, Wolf, Cat, Ocelot, Goat, Axolotl, Camel, Sniffer, Bee, Hoglin, Strider, Villager

You can customize this list by creating your own data/overnight/tags/entity_types/growable_animals.json override.

📦 Installation

Fabric Mod

1. Ensure you have the Fabric Loader and Fabric API installed for Minecraft 1.21.4 (snapshot 26.1.2 equivalent).
2. Download the .jar file from Modrinth.
3. Place the file into your .minecraft/mods/ directory (for singleplayer) or <server directory>/mods/ (for servers).
4. Launch the game.

Datapack

1. Download the datapack .zip file.
2. Singleplayer: Place the .zip file into:

   .minecraft/saves/<Your World>/datapacks/
   

3. Server: Place the .zip file into:

   <server directory>/world/datapacks/
   

4. Run /reload in the console or in-game (or restart the world/server).

⚙️ Configuration

Fabric Mod Commands

The Fabric mod provides a dedicated /overnight command (requires OP/moderator level 2 permission):

Datapack Commands

The Datapack version uses /function commands and features an interactive chat menu:

Default Settings

Rate Guide

🔧 Technical Details

Architecture

• Sleep detection: Polls SleepTimer NBT every tick using a single efficient selector
• State machine: Tracks sleeping transitions (start → tick → stop) with scoreboard flags
• Plant acceleration: Multiplies randomTickSpeed during the ~100-tick sleep window
• Animal acceleration: Reads/modifies baby Age NBT via scoreboard operations each tick during sleep
• Safety: Saves and restores randomTickSpeed and doFireTick gamerules, with fallback defaults

Performance

• Tick function is a single execute store + 3 conditional checks (negligible overhead)
• Mob growth only processes entities matching #overnight:growable_animals tag AND is_baby predicate
• All acceleration only runs during the brief sleep window (~5 seconds in singleplayer)

Multiplayer

• Acceleration activates as soon as any player sleeps (regardless of playersSleepingPercentage)
• Deactivates when the last sleeping player wakes up
• Works with vanilla sleep percentage rules and one-player-sleep datapacks

📁 Project Structure

Overnight-Datapack/
├── pack.mcmeta                          # Pack metadata (format 101)
├── pack.png                             # Datapack icon
├── LICENSE                              # CC BY-NC-ND 4.0
├── README.md
└── data/
    ├── minecraft/tags/function/
    │   ├── load.json                    # Hook: runs on load/reload
    │   └── tick.json                    # Hook: runs every game tick
    └── overnight/
        ├── tags/entity_type/
        │   └── growable_animals.json    # Baby animal types to accelerate
        ├── predicate/
        │   └── is_baby.json             # Efficient baby entity check
        └── function/
            ├── load.mcfunction          # Initialize scoreboards & defaults
            ├── tick.mcfunction          # Sleep state detection loop
            ├── sleep_start.mcfunction   # Save gamerules, apply acceleration
            ├── sleep_tick.mcfunction    # Per-tick mob growth dispatch
            ├── sleep_mob_tick.mcfunction # Baby animal age manipulation
            ├── sleep_stop.mcfunction    # Restore original gamerules
            ├── apply_plant_speed.mcfunction  # Calculate & set tick speed
            ├── set_tick_speed.mcfunction     # Macro: gamerule setter
            └── config/
                ├── menu.mcfunction          # Interactive chat config UI
                ├── toggle_plants.mcfunction # Toggle plant growth
                ├── toggle_mobs.mcfunction   # Toggle animal growth
                ├── set_plant_rate.mcfunction # Macro: set plant multiplier
                └── set_mob_rate.mcfunction   # Macro: set animal multiplier

📋 Credits

Created by @TomerGamerTV

📄 License

This project is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

You are free to share this datapack with proper attribution, but you may not use it commercially or distribute modified versions.