To hang Christmas lights on windows, first measure the window to determine the length of lights needed. Use suction cup hooks or window clips to attach the lights directly to the glass. Begin by placing the hooks or clips evenly along the top edge of the window frame, then drape the lights down to the bottom. For a clean look, ensure the lights are spaced evenly and securely attached. Avoid using nails or adhesive that can damage the window or leave residue.

Hanging Christmas lights on windows can be done with suction cup hooks or window clips. Measure the window, place hooks evenly, and drape lights for a clean, festive look. Ensure hooks are secure and avoid damaging the glass.