Extra Long Days

Extends the length of a Minecraft day, from 20 Minutes to 2 Hours, by very simply slowing down the daylight cycle to 1/6th speed.

This is a datapack, and thus entirely server-side and not needed on the client unless you are playing singleplayer

Compatibility
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There should be no major compatibility issues

Removal
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To remove the datapack from your world or server, run the following two commands before removing the pack from your datapacks folder:

/gamerule doDaylightCycle true

/scoreboard objectives remove time_since_rest