TooMuchTime Mod 1.7.10, 1.7.2 allows players and server owners to fine-tuned control over Minecraft's day/night cycle by being able to control how long each cycle lasts.

Not only that, but it ensures that a minimal amount of sync issues to provide a smooth experience for the player, and doesn't interfere with the world tick time. What this means is mods that rely on the world time to be consistent won't break.