It depends if you've downloaded the game or not. If you have not downloaded it, you'll need to write down the save code found in the "Manage Save Data" in the options menu on the title screen, and load it tomorrow. If you did download it, then it's a lot more simple; you just wait until tomorrow, and once you load Day 2 the light will be there. Although, it isn't required to wait until tomorrow if you do not want to. Auto Skip Wait in the options menu on the title screen disables the waiting when it is enabled.