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Day LengthMinecraft mod for 1.21.6

Change how long a Minecraft day lasts and sync it with real-world time.

client and servernewest supported 1.21.6UtilityAdventureGame MechanicsOptimization
Latest version
3.0.2
Minecraft
1.14.4 to 1.21.6
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
GPL-3.0-only
Downloads
7.4k
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Day Length servers

One click and Day Length is installed with the right loader, on hardware built for it.

  • 1.21.6
  • NeoForge
  • Forge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Day Length declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.6NeoForge, Forge, Fabric21+declared17 Jun 2025
1.21.4Fabric, NeoForge, Forge21+declared3 Dec 2024
1.21.1Forge, NeoForge, Fabric21+declared8 Aug 2024
1.20.6Forge, NeoForge, Fabric21+declared29 Apr 2024
1.20.5Forge, NeoForge, Fabric21+declared23 Apr 2024
1.20.4Forge, NeoForge, Fabric17+declared7 Dec 2023
1.20.3Fabric, Forge, NeoForge17+declared4 Dec 2023
1.20.2NeoForge, Forge, Fabric17+declared20 Sept 2023
1.20.1Fabric, NeoForge, Forge17+declared12 Jun 2023
1.19.4Forge, NeoForge, Fabric17+declared14 Mar 2023
1.19.2NeoForge, Forge, Fabric17+declared5 Aug 2022
1.18.2NeoForge, Forge, Fabric17+declared28 Feb 2022
1.16.5Fabric, NeoForge, Forge8+declared14 Jan 2021
1.14.4Forge, Fabric, NeoForge8+declared19 Jul 2019

Download

From Day Length’s own host. Nothing is re-hosted here.

3.0.2release31 May 2026

daylength-3.0.2-forge-1.20.1.jar · 80 KB · for 1.20.1

Download latest
71c1d6b54284…
Older versions8
  • 3.0.13 Mar 20261.21.199 KB306 downloadsf6903530f3aa…Get
  • 3.0.01 Mar 20261.20.10.2 MB38 downloads4bb934fcdce8…Get
  • 2.0.28 Jul 20251.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more26 KB1.7k downloadsf7492ad757ff…Get
  • 2.0.18 Jul 20251.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more23 KB69 downloadsa728198c5568…Get
  • 2.0.022 Jun 20251.21.621 KB154 downloads7f2b4d2acaf2…Get
  • 2025.4.1.214 Apr 20251.21.441 KB391 downloadsd6a28f27b120…Get
  • 2025.4.1.113 Apr 20251.21.441 KB51 downloads82f9d0f72a17…Get
  • 2025.3.1.028 Mar 20251.21.41.0 MB63 downloads9e4033540865…Get

Frequently asked

Does Day Length work on Minecraft 1.21.6?

Yes. 1.21.6 is the newest Minecraft version Day Length declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Day Length support?

Everything the author has declared, from 1.14.4 up to 1.21.6. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Day Length on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Day Length support?

NeoForge, Forge, Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Day Length?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Day Length under?

GPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Day Length?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Day Length safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from Modrinth, where the author last updated it on 31 May 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .