This mod limits the amount of 'daytime' you have, giving you less time to build thus making the game harder. Please note: Thronefall SetDayTimer Mod is not yet finished and requires extensive testing.
Using Thunderstore:
I highly recommend using Thunderstore to install this mod. r2modman supports Thronefall profiles and allows you to install, disable and uninstall mods quickly and easily.
Manual Installation:
Quick Debug: If your game crashes on the third night, a quick re-install of the mod should fix it. Otherwise, please have a look in the Thronefall Discord #game-mods channel or get in touch with donnertm.
The SetDayTimer mod was made specifically for a purpose I cannot yet reveal. It makes the game harder by giving you a limited amount of time during the day to build / upgrade your castle. No other aspect of the game is changed by this mod.
Currently, I have no way of letting you modify the time limit for each day, you would need to edit the code yourself.