Using Time Control, I set the total length of a day to be 30 mins instead of the usual 20, meaning that a day is 36,000 ticks instead of the usual 24,000. This means that the clock is now incorrect.
Requires the library mod Collective. This mod is part of The Vanilla Experience modpack and Serilum's Client Bundle mod. GUI Clock is a minimalistic client-side mod which shows the time in the GUI on ...