What If Seasons is Confined to Specific Locations?

I am sure they can do it.
I just have no clue if they can without breaking all the savegames.
They said that making apartments buildable outside of where they already are would require a patch that would inevitably break all savegames.
Forgotten Hollow has longer night than other worlds. The code for it allowes modders to change the length of day and night in all other worlds without breaking savegames.