ModsFinder

Dynamic Daytime

by imalittlhigh

Dynamic Daytime changes how long each day and night lasts, based on how many days a world has been played.

FabricForgeNeoForgeQuiltServer required, client optionalMIT License1.21 – 1.21.5

What it does

The mod follows a yearly cycle of 100 in-game days. Days and nights are stretched or shortened as the cycle moves, starting from the middle of summer, and the cycle restarts once 100 days have passed. The day length varies between half and twice the normal speed. Server owners can set this behavior through a datapack. Only the server needs the mod, so players can join without installing it. It is published for Fabric, Forge, NeoForge and Quilt, for game versions 1.21 – 1.21.5, under the MIT License, and it is not open source.

Key features

  1. Yearly day cycle

    Day length follows a cycle of 100 days that restarts once a full year has passed.

  2. Variable speed

    Daytime runs at half speed and nighttime at double speed, making days long and nights short.

  3. Summer start

    The cycle begins in the middle of summer, when days are twice as long as normal days.

Compatibility

Latest build for each game version and loader.

1.21.51.21-1-mod1.21-1-mod1.21-1-mod1.21-1-mod
1.21.41.21-1-mod1.21-1-mod1.21-1-mod1.21-1-mod
1.21.31.21-1-mod1.21-1-mod1.21-1-mod1.21-1-mod
1.21.21.21-1-mod1.21-1-mod1.21-1-mod1.21-1-mod
1.21.11.21-1-mod1.21-1-mod1.21-1-mod1.21-1-mod
1.211.21-1-mod1.21-1-mod1.21-1-mod1.21-1-mod
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Extra Long Days is server required with the client optional, under the GNU Lesser General Public License v3.0 or later, and covers 1.20 – 1.21.11. DayNight Control is a client and server mod under the MIT License, covering 1.21.1 – 26.3.

ModLoadersGame versionsEnvironmentUpdated
Dynamic DaytimeFabric, Forge, NeoForge and Quilt1.21 – 1.21.5Server required, client optional2025-04-16
Extra Long DaysFabric, Forge, NeoForge and Quilt1.20 – 1.21.11Server required, client optional2026-03-15
DayNight ControlFabric, Forge and NeoForge1.21.1 – 26.3Client and server2026-10-08

Questions

Does Dynamic Daytime need to be installed on clients?

No. The server must run it, while players may leave it out.

In the catalog

Dynamic Daytime is one of 19,031 Adventure mods on ModsFinder, and one of 10,052 Adventure mods for Fabric. 15,307 mods support Minecraft 1.21.5.

More from imalittlhigh

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What the author says

This Datapack adjusts the length of the Day/Night cycle depending on the number of days the world is played. I have implemented a yearly cycle. One year is 100 Days to not make it to long. After 100 Days have passed the cycle starts anew.
imalittlhigh, on the Modrinth page

Official listing

Owner
imalittlhigh
Published
2025-04-15
Updated on Modrinth
2025-04-16
Facts verified
2026-10-15

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