During any given day you can run out of things to do or buy. So here's a solution: Save your current game, then turn the GC off. Open the lid and turn the GC on so the main GC menu comes up. Go into the calendar and change the date and/or time to whatever you want. Then close the lid and start the game. It will now be that time/day in the game and you have new stuff to buy and things to do. This works great with Halloween and "Toy Day" (Christmas). You can then switch back to the regular day and time without fault.