Next to each savefile the game should display some information, for example real date and hour, ingame date and hour and a screenshot. The metadata could be written into a small additional file for the saveslot. The screnshot needs to be created right before opening the menu and then written to the savefolder if the player decides to save
Addendum: Screenshot can be created on demand. Just move the non-menu draw method into a different submethod so it can be called individually and use this to draw into a canvas that can be downscaled afterwards
Next to each savefile the game should display some information, for example real date and hour, ingame date and hour and a screenshot. The metadata could be written into a small additional file for the saveslot. The screnshot needs to be created right before opening the menu and then written to the savefolder if the player decides to save