Idol School (Hangul: 아이돌 스쿨 ) is a South Korean variety show, which airs on MBC Music, MBC's cable and satellite network for music.
 The show is hosted by Jun Hyun-moo, singer Kim Yeon-woo and Sojin of Girl's Day.
Weekly Idol () is a South Korean variety show, which airs Wednesdays, 6PM KST, on MBC Every1, MBC's cable and satellite network for comedy and variety shows.
 The show is hosted by comedian Jeong Hyeong-don and rapper Defconn.
 The set is often referred to as B3 (basement level 3).
The Gwiyomi Song, or Kwiyomi Song (귀요미 송), is a K-pop single by South Korean singer Hari and was released on February 18, 2013.
 It was inspired by a gesture from South Korean rapper Jung Ilhoon of boy group BtoB.
 The gesture is called 'Gwiyomi Player', that was popularized by South Korean variety show "Weekly Idol" through a segment called "The Aegyo Battle" (Battle of Cuteness) following Ilhoon's guest appearance on the show in October 2012.
 The song went on to be a viral success and an Internet meme after Korean Media outlet "Sports Seoul" uploaded a clip of Hari performing the gestures and singing the song.
 This video has since inspired many Asian netizens to upload their own versions onto the internet.
Keep Running (), previously known as Running Man () before 2017, is a Chinese variety show broadcast on ZRTG: Zhejiang Television.
 It is a spin-off from the popular original South Korean variety show "Running Man" by SBS.
 It was first aired on 10 October 2014.
 The show is classified as a game-variety show, where the MCs and guests complete missions at a landmark to win a race.
Teen Top's Rising 100% is a South Korean variety show featured on the Seoul Broadcasting System (SBS) and produced by MTV.
 A total of ten episodes of the series were aired from June 10, 2012 to August 18, 2012.
 The show, labeled a 'real variety' show, was hosted by Kim Tae Hyun and included the bands Teen Top and 100%.
 Each week, the two bands competed to win the support of fans and earn prizes.
 The SBS MTV outing was viewed as a success, with the producers moving forward on new episodes under the title "Teen Top and 100%".
"We Got Married" (Season 1) is the first season of "We Got Married" (우리 결혼했어요), a popular reality South Korean variety show and a segment of the "Sunday Sunday Night" program.
 First broadcast in 2008, the show pairs up Korean celebrities to show what life would be like if they were married.
 Each week, couples are assigned missions to complete, with candid interviews of the participants to reveal their thoughts and feelings.
Vitamin is a South Korean variety show, which airs on KBS2, KBS's cable and satellite network for comedy and variety shows.
 The show is hosted by Kim Tae-hoon and Lee Hwi-jae.
 The show ended its run on March 9, 2017 after 14 years.
Jung Il-hoon (; born October 4, 1994), simply known as Ilhoon, is a South Korean rapper, songwriter, record producer, and actor.
 He is the main rapper of the South Korean boy group BtoB.
 He is well known for his multiple song featurings with artists such as Hyuna and G.NA and as an assistant MC in the variety show "Weekly Idol".
 Ilhoon made his acting debut as he starred in the drama "Webtoon Hero: Tundra Show" in 2015.
 He was also known for inventing and popularizing the gestures for "Gwiyomi Player".
Pot Stand () is a South Korean variety show which first ran on June 6, 2017 on KBS2 at 11:10 PM KST.
 it is a real variety show wherein guests publish their own books, recording the events of their daily lives to share them with others.
"We Got Married" (Season 2) is the second season of "We Got Married" (우리 결혼했어요), a popular reality South Korean variety show and a segment of the "Sunday Sunday Night" program.
 First broadcast in 2008, the show pairs up Korean celebrities to show what life would be like if they were married.
 Each week, couples are assigned missions to complete, with candid interviews of the participants to reveal their thoughts and feelings.

Question: Gwiyomi was popularized on a South Korean variety show that airs on which day of the week?
Answer: Wednesdays