A followup to their earlier "Snoopy vs. the Red Baron", the song is about how Snoopy had to go out and fight the Red Baron on Christmas Eve. The Baron has Snoopy at his mercy after a long dogfight, but instead of shooting him down he forces Snoopy to land and offers Snoopy a holiday toast. Afterward, Snoopy and the Red Baron fly their separate ways, "each knowing they'd meet on some other day". The release begins with an unknown chorus singing "O Tannenbaum". The middle of the song is bridged by chimes ringing out a phrase from "Hark the Herald Angels Sing". The chimes can also can be heard during the fade-out at the end of the song. The album version of the song has a simulated radio news report of failed efforts at a Christmas truce, leading to Snoopy being sent out to hunt his sworn foe. The song references the 1914 "The Christmas Truce" of World War I which was initiated not by German and British commanders, but by the soldiers themselves. The length of the cease-fire varied by location, and was reported to have been as brief as Christmas Day or as long as the week between Christmas and New Year's Day. Trench-bound combatants exchanged small gifts across the lines, with Germans giving beer to the British, who sent tobacco and tinned meat back in return. No Man's Land was cleared of dead bodies, trenches were repaired and drained, and troops from both sides shared pictures of their families and, in some places, used No Man's Land for friendly games of football. The song even has the initiator correct as it was generally the German soldiers who called over to the British and initiated the truce and, in the song, it is the Red Baron—a German WWI hero—who extends the hand of Christmas friendship to Snoopy.
Reception
"Snoopy's Christmas" reached the No. 1 position in the New Zealand and Australia singles charts in 1967, and remains a popular Christmas song in those countries. The song was the fastest-selling single at the time it was originally released and is estimated to be the biggest selling overseas single sold in New Zealand in the 20th century. The song frequently reenters the New Zealand singles chart, charting in December 1987, 1988, 1989, and 2013. "Snoopy's Christmas" was also voted "the worst Christmas song of all time" by readers of the New Zealand Herald in 2007.