"Merry Christmas, Charlie Manson!" is the sixteenth episode in the second season of the American animated television series "South Park". The 29th episode of the series overall, it originally aired on Comedy Central in the United States on December 9, 1998. The episode was written by series co-creator Trey Parker, along with Nancy M. Pimental, and directed by Eric Stough.
Although we're unsure of whether an episode for South Park was released in any month besides December, we know for sure that an episode was released during December.