How many epsiodes , including the 280th will be in the season of South Park where Holdiay Special is an episode?
Holiday Special (South Park): "Holiday Special" is the third episode in the twenty-first season of the American animated television series "South Park". Holiday Special (South Park):  The 280th episode of the series overall, it first aired on Comedy Central in the United States on September 27, 2017.
i don't know