I know that making your home more comfortable and reading books makes time pass much faster, which is a pretty nice feature, but what if I don't want that feature? What if I actually want to wait 400 days? I guess I could sit in the Halls of Eternity to get my timer back to where it needs to be, but that feels really tedious and I'd much rather spend that time actually playing.

Are there currently any mods or something that could disable that "fast pass" feature?

Figured it out. You have to look at the hourglass a bunch of times until the shade asks if you want to keep the "fast time" feature or slow it down to normal speed.

I had no idea, this can be helpful, thanks! Does it work the opposite way too? I mean, can you go back to fast after you switched once?