how to plug in christmas lights without outdoor outlet

Oh, well, that's a tricky one. If you don't have an outdoor outlet to plug in the lights, you can use an extension cord to plug them into an indoor outlet. Just make sure the cord is rated for outdoor use and make sure it's plugged into a GFCI outlet to prevent electrical hazards. Make sure the cord is also covered in snow or ice and keep the cords away from water.