The Spirit of Christmas is the title given to two adult stop motion animated short films created by the duo Trey Parker and Matt Stone. The two films were released at different periods—the first in 1992, and the second in 1995—and form the basis for the animated series South Park, the latter short featuring more established depictions of the series' setting and characters. To differentiate between them, the respective films have been retroactively referred to as Jesus vs. Frosty and Jesus vs. Santa. A clip of both films appears on two respective billboards during the opening sequence for South Park's first four seasons (prior to the fourth season episode "Fourth Grade").