Question: A Very Crappy Christmas was an episode in season four of South Park, which began airing on what date?

full_context: Document 1: The Tale of Scrotie McBoogerballs: "The Tale of Scrotie McBoogerballs" is the second episode of the fourteenth season of the American animated television series "South Park", and the 197th overall episode of the series. It originally aired on Comedy Central in the United States on March 24, 2010. In the episode, the South Park boys write a vulgar book with the sole intention of getting it banned. When Stan's parents discover the manuscript, the boys accuse Butters of writing it, then are enraged when it becomes hailed as a literary masterpiece.
Document 2: The Poor Kid: "The Poor Kid" is the fifteenth season finale of the American animated television series "South Park", and the 223rd episode of the series overall. It first aired on Comedy Central in the United States on November 16, 2011. In the episode, Kenny and his brother and sister are sent to a foster home after police discover a meth lab in their house. As a result, Cartman is left with feelings of loss, since he no longer has someone to ridicule for their poverty.
Document 3: The Wacky Molestation Adventure: "The Wacky Molestation Adventure" is the sixteenth episode of the fourth season of the animated television series "South Park", and the 64th episode of the series overall. "The Wacky Molestation Adventure" originally aired in the United States on December 13, 2000 on Comedy Central. The episode follows the children of South Park, who remove all adults from the town by claiming that they molested them. With the whole town to themselves, they create a new society, but it quickly deteriorates and two separate groups are formed. Much of the episode's plot is inspired by the 1984 film "Children of the Corn", based on the Stephen King short story.
Document 4: South Park (season 6): Season six of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 6, 2002. The sixth season concluded after 17 episodes on December 11, 2002. This season is notable for being the only one without Kenny as a main character, as he was written off in the previous season. Kenny, however, plays a part in some episodes without appearing and returns at the conclusion of the final episode.
Document 5: South Park (season 9): Season nine of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 9, 2005. The ninth season concluded after 14 episodes on December 7, 2005. All of the episodes in the ninth season were written and directed by Trey Parker.
Document 6: South Park: South Park is an American adult animated sitcom created by Trey Parker and Matt Stone and developed by Brian Graden for the Comedy Central television network. The show revolves around four boys—Stan Marsh, Kyle Broflovski, Eric Cartman, and Kenny McCormick—and their bizarre adventures in and around the titular Colorado town. Much like "The Simpsons", "South Park" uses a very large ensemble cast of recurring characters and became infamous for its profanity and dark, surreal humor that satirizes a wide range of topics towards a mature audience.
Document 7: South Park (season 7): Season seven of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 19, 2003. The seventh season concluded after 15 episodes on December 17, 2003, and was written and directed by Trey Parker.
Document 8: South Park (season 2): Season two of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on April 1, 1998. The second season concluded after 18 episodes on January 20, 1999; it remains the longest season of "South Park" to date. While most of the episodes were directed by series creator Trey Parker, Season 2 includes two episodes directed by Eric Stough.
Document 9: Holiday Special (South Park): "Holiday Special" is the third episode in the twenty-first season of the American animated television series "South Park". The 280th episode of the series overall, it first aired on Comedy Central in the United States on September 27, 2017.
Document 10: A Very Crappy Christmas: "A Very Crappy Christmas" is the seventeenth and final episode of the fourth season of the animated television series "South Park", and the 65th episode overall. It first aired on Comedy Central in the United States on December 20, 2000. In the episode, Kyle awaits Mr. Hankey on Christmas, but he does not show up. To try to spread some Christmas cheer, Kyle and the boys decide to create their own animated special.
Document 11: South Park (season 1): The first season of the animated television series "South Park" ran for 13 episodes from August 13, 1997 to February 25, 1998 on the American network Comedy Central. The creators Trey Parker and Matt Stone wrote most of the season's episodes; Dan Sterling, Philip Stark and David Goodman were credited with writing five episodes. The narrative revolves around four children—Stan Marsh, Kyle Broflovski, Eric Cartman and Kenny McCormick—and their unusual experiences in the titular mountain town.
Document 12: South Park (season 4): Season four of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on April 5, 2000. The fourth season concluded after 17 episodes on December 20, 2000.
Document 13: Krusty Gets Kancelled: "Krusty Gets Kancelled" is the 22nd and final episode of "The Simpsons"<nowiki>'</nowiki> fourth season. It first aired on the Fox network in the United States on May 13, 1993. In the episode, a new show featuring a puppet named Gabbo premieres in Springfield and competes with Krusty the Clown's show. Krusty's show is soon cancelled, and Bart Simpson decides to help Krusty get back on the air by staging a comeback special.
Document 14: South Park (season 8): Season eight of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 17, 2004. The eighth season concluded after 14 episodes on December 15, 2004, and was written and directed by Trey Parker. The season deals with various topics that were relevant at the time of release. The episodes portray a spectrum of topics, from effect of large scale retails corporations to immigration.
Document 15: A Very Special Family Guy Freakin' Christmas: "A Very Special Family Guy Freakin' Christmas" is the sixteenth episode of "Family Guy"' s third season. It originally aired on Fox on December 21, 2001. In the episode, it is Christmas time in Quahog, a time when Lois's plans for a perfect holiday blow up in her face, causing her to have a mental breakdown. Stewie uses his role as the baby Jesus in the town play to be good for Santa Claus, about whom he has become paranoid, and show Lois the true meaning of Christmas.
ground_truth: April 5, 2000