The best time to put out the elf on the shelf is usually around the beginning of December. This way, the elf can be a part of all the holiday preparations and activities. However, it's important to remember that the elf is supposed to be a fun and lighthearted tradition, so there's no need to worry too much about when exactly you put him out. The important thing is that he's there to bring joy and magic to your home during the holiday season.