Question: What is the birthday of the actor who was replaced by Jeong Jae-heon on ""?
Context: Hyung-don and Dae-joon's Hitmaker () is a 2014 South Korean variety television series presented by South Korean producer duo Jeong Hyeong-don and Defconn.  It first aired on MBC Every1 on Tuesday at 6:00 pm KST beginning July 29, 2014.  It ran for two seasons in 2014 and 2015, documenting the formation and debut processes of their first boy group Big Byung (Korean: 빅병 ) and their first girl group Chamsonyeo (Korean: 참소녀 ).  It was renewed for another season in 2016, with Season 1 and 2 host Defconn being replaced by BEAST's Yong Jun-hyung.  The hosts, along with N.Flying's Cha Hun travelled to Dublin, Ireland to stage a performance. Jeong Jae-heon (Korean: 정재헌 ; born April 18, 1975) is a South Korean voice actor and actor.  He joined Munhwa Broadcasting Corporation's voice acting division in 2002.  After being a freelancer, Jae-heon made a brief appearance on a 2005 South Korean film "Quiz King", playing his role as a television news reporter.  The voice actor became popular with his dub of Kiyomaro Takamine on "Zatch Bell! ", which has been one of his signature works.  He gained popularity also by replacing Adam Rodriguez on "", and Archie Kao on "".  In late 2011, Jae-heon once was on stage, portraying Lee Mong-ryong in a South Korean charity play "Hyang-dan, Fly".  He has recently been known for his voicing Shota Kazehaya on the Korean dub of a Japanese television animation series "From Me to You", which made many fans of Jae-heon call him 정재하야 (Jeong-jae-ha-ya, a compound word formed from "Jeong Jae"-heon and Kaze"haya"). Kendrick Kang-Joh "Ken" Jeong, M.D. (born July 13, 1969) is an American comedian, actor and physician.  He is best known for his roles as Ben Chang on the critically acclaimed NBC/Yahoo! sitcom "Community" and gangster Leslie Chow in "The Hangover Trilogy".  He was the lead in the ABC sitcom "Dr. Ken," in which he was also the creator, writer and executive producer. Jeong Jin-woon (Hangul: 정진운), most often credited as Jinwoon, is a South Korean idol singer and actor.  Debuted as a member of the group 2AM in July 2008.  Began his acting career in 2012 in the KBS's series "Dream High 2", playing Jin Yoo-jin. Stephen Tobolowsky's Birthday Party is a 2005 documentary film about character actor Stephen Tobolowsky in which he tells stories from his life.  The actor, who is usually in a supporting role, takes center stage in the 87-minute birthday party. Cosmic Psychos are an Australian punk rock band which formed in 1977 as Spring Plains.  Founding members included Ross Knight on guitar and vocals; Robbie Addington on guitar and vocals; and Steve Morrow on vocals.  Australian rock music historian, Ian McFarlane, described their music as "arty kind of punk noise, somewhere between The Birthday Party and a more narcotic sounding Ramones".  Late in 1984 the group was renamed as Cosmic Psychos.  They issued their debut album, "Down on the Farm", in December 1985.  Several albums have followed and were backed by national tours and international tours to Europe and North America including festivals with Mudhoney, Nirvana, L7, Helmet and Motörhead.  In 1990 Jones was replaced by Robbie Watts on guitar and vocals.  By 2005 Walsh was replaced by Dean Muller (Hoss, Chris Russell's Chicken Walk) on drums.  On 1 July 2006 Watts died of a heart attack, aged 47, and the band continued with John McKeering (ex-The Onyas) joining. Adam Michael Rodriguez (born October 2, 1975) is an American actor, screenwriter and director.  He became known for his long running role as Eric Delko on "".  He is currently portraying Task Force Agent and the newest recruit to the BAU Agent Luke Alvez in "Criminal Minds". Jeong Nam (born January 30, 1968)(Hangul:정남) is a Korean voice actor.  Jeong Nam joined the Munhwa Broadcasting Corporation's voice acting division in 1996.  In addition, Nam also has acting experience and was in the Korean version of 24 as Nina Myers. Elton Chong (real name Jeong Jin Hwa) was born in 1955 and is a Korean martial artist, action director, and actor.  Elton Chong has mostly worked in South Korea with actors such as Eagle Han-ying, Casanova Wong, Michael Wong and Dragon Lee.  While most of his work is with the director Kim Jeong Yong, Elton Chong often appeared in Godfrey Ho's movies, especially Hong Kong movies that were imported into Korea.  He is perhaps best known for the movie "Shaolin Drunken Monkey" (known in Korea as "The Shaolin Chief Cook".) . Eom Hyeon Jeong () is a South Korean voice actor.  She joined the Munhwa Broadcasting Corporation's voice acting division in 1996.  It is popular voice acting to MBC's "Ojamajo Doremi" and "Bikkuriman".  Currently , Eom Hyeon Jeong is cast in the Korea TV edition of "24" as Sherry Palmer, replacing Penny Johnson Jerald.
Answer: October 2, 1975