Question: How many epsiodes , including the 280th will be in the season of South Park where Holdiay Special is an episode?

Context articles: I'm a Little Bit Country
Fatbeard
280th Combat Communications Squadron
Gronkowsbees
Conjoined Fetus Lady
South Park (season 21)
Dunbar Cave State Park
Something Wall-Mart This Way Comes
Chickenlover
Holiday Special (South Park)

"I'm a Little Bit Country" (also known as "The South Park KICK-ASS 100th episode TV special") is the fourth episode of the seventh season of the American animated television series "South Park", and the 100th episode of the series overall.
 It originally aired on Comedy Central in the United States on April 9, 2003.
 The episode title is based on the song "I'm a Little Bit Country" by Marty Cooper, as made famous by Donny and Marie Osmond.
"Fatbeard" is the seventh episode of the thirteenth season of the American animated television series "South Park".
 The 188th overall episode of the series, it originally aired on Comedy Central in the United States on April 22, 2009 and in the United Kingdom on April 24, 2009.
 It was the mid-season finale, marking the final "South Park" episode for six months.
 In the episode, Cartman misinterprets news reports about piracy in the Indian Ocean to mean the return of the classic era of swashbuckling pirates, and misleads a handful of South Park boys to voyage to Mogadishu to start a pirate crew.
The Air National Guard's 280th Special Operations Communications Squadron (280th SOCS) is a communications unit located at Dothan Regional Airport, Alabama.
 The 280th SOCS provides over 44% of Air Force Special Operations Command's deployed communications capabilities.
"Gronkowsbees" is the eleventh episode of the fifteenth season of the animated sitcom "Family Guy", and the 280th episode overall.
 It aired on Fox in the United States on January 15, 2017, and is written by Cherry Chevapravatdumrong and directed by Jerry Langford.
"Conjoined Fetus Lady" is the fifth episode in the second season of the American animated television series "South Park".
 The 18th episode of the series overall, it originally aired on Comedy Central in the United States on June 3, 1998.
 The episode was written by series co-creators Trey Parker and Matt Stone, along with David R. Goodman, and directed by Parker.
 In the episode, South Park Elementary's dodgeball team travels to China to compete for the dodgeball championship, while the town of South Park pays tribute to the school nurse, who is living with conjoined twin myslexia.
The twenty-first season of the American animated sitcom "South Park" premiered on Comedy Central on September 13, 2017, and will contain ten episodes.
Dunbar Cave State Park is a 110 acre (450,000 m²) park in Clarksville, Tennessee, situated around Dunbar Cave.
 Dunbar Cave is the 280th largest cave complex in the world, stretching 8.067 miles (13 km) inward.
 In front of the cave entrance is a large concrete poured structure with three distinct arches.
 The cave is located in an area of karst topography, including sinkholes, springs, and limestone bedrock.
 The manmade Swan Lake also sits in front of the cave.
 In March 2010 the cave was closed to tours and visitors because a bat infected with White nose syndrome was found in the cave.
 However as of August 2015 cave tours are back open again.
"Something Wall-Mart This Way Comes" is the ninth episode of the eighth season of the American animated television series "South Park", and the 120th episode of the series overall.
 It originally aired on Comedy Central in the United States on November 3, 2004.
 In the episode, a Wall-Mart is built in South Park, and the people start to get addicted to shopping from it, due to its irresistibly attractive bargains, thus leading many businesses in South Park to close down.
 The four boys have to fight against Wall-Mart and to find a way to stop it from taking over the entire town.
"Chickenlover" is the fourth episode in the second season of the American animated television series "South Park".
 The 16th episode of the series overall, it originally aired on Comedy Central in the United States on May 27, 1998.
 The episode was written by series co-creators Trey Parker and Matt Stone, along with David R. Goodman, and directed by Parker.
 In the episode, Officer Barbrady resigns as South Park's only police officer because of his illiteracy.
 Anarchy ensues, just as chickens are mysteriously being molested across South Park.
 Barbrady enlists the help of the boys to learn to read and discover who is molesting the chickens.
 Cartman, meanwhile, masquerades as a police officer.
"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.