Halloween on Christmas is only ideal for Jack Skellington, Blink-182, and everyone who comes to see this throwback classic! . The Nightmare Before Christmas Thursday, Dec. 6th | 8pm | Chem 140 Free Admission & Popcorn | Open to the Public . cuboulder cu_umc cuboulderinvolvement #throwbackthursday #tbt #holidays #happyholidays #christmas #halloween #nightmarebeforechristmas #jackandsally #halloweenonchristmas #filmseries #forthemoviebuffinyou