Decoupled Time

Per-dimension time independence for NeoForge 1.21.1+

Decoupled Time lets each dimension run on its own clock. Dimensions no longer sync their day/night cycle to the Overworld — instead, each one tracks its own local time independently. Want permanent daylight in your team dimension while the Overworld cycles normally? Done.

By default, Minecraft forces every dimension to share the same day/night cycle. Decoupled Time breaks that link. Each configured dimension gets its own dayTime and gameTime, ticking independently from the rest of the server.

What it does

• Independent time per dimension — Configure which dimensions run on their own clock using a simple whitelist or blacklist in the config. Supports wildcards (e.g. modid:*).
• Configurable day length — Make days longer or shorter with a single multiplier. Set it to 2.0 for 40-minute days, 0.5 for 10-minute days, or leave it at 1.0 for vanilla behavior.
• Smart pausing — Time only progresses in a dimension when players are actually there. Empty dimensions freeze until someone shows up. Spectators can optionally be excluded.
• Dimension-aware time commands — /time commands (set, add) accept an optional dimension argument, so you can manage each dimension's clock from anywhere.
• Sleep stays local — When players sleep, only the current dimension's time advances. Other dimensions keep ticking at their own pace.
• Time sync on join — Players receive the correct local time when they log in or change dimensions, so the sun is always where it should be.

Who it's for

Server operators and modpack developers who want more control over how time works across dimensions. Particularly useful alongside mods that add custom dimensions (like FTB Teams) where a fixed time of day makes more sense than a cycling clock.