Well, it depends on where you live, but typically, people start putting up Christmas lights in November, so they can enjoy the festive atmosphere throughout the holiday season. However, I know that many families wait until December, so they can enjoy the lights along with other Christmas decorations. The most important thing is to make sure you're safe when putting up the lights, and that they're not too bright or distracting to your neighbors. Do you like decorating your home for Christmas?