i figured out how to change Daylenght in a singleplayer sandbox game

[derboss]

this hack comes without any warrenty. do it at your own risk!(and backup your savegame)
normaly its not possible even in debug mode to change the daylengh in an ongoing game.

first start a new game with the daylenght you perfer.

then you need to find the map_sand.bin file in your savegame folder.

open it with a hex editor and search for daylenght.
remember that value and open the file you wanna change the daylenght.
change the value you remembered, save and well done.

I have testet it with one of my savegames and nothing seem broken.
if you dont know how to hex edit a file, dont mess around with it ! :)

[Shady Allie]

I have done that as well. It worked for my last game.