In case you lost your save data or just want to load a specific day, you can use these save files.
They may also help with unlocking certain achievements.

Place the save files you need in the following folder:
C:\Users\<username>\AppData\LocalLow\VIS_Games\Pineview Drive\Savegames

You can also copy all of them at once — just select the desired day from the “Load Game” menu in-game.