Question: What year is the show Young Sheldon, narrated by Jim Parsons, set in?

Context articles: Young Sheldon
Penny (The Big Bang Theory)
Australian Idol
Steven Molaro
David Javerbaum
Sheldon Cooper
Emily Osment videography
The Hawking Excitation
The Infestation Hypothesis
Leonard Hofstadter

Young Sheldon (stylized as young Sheldon) is an American television sitcom on CBS created by Chuck Lorre and Steven Molaro.
 The series is a spin-off prequel to "The Big Bang Theory" and follows the character Sheldon Cooper at the age of 9, living with his family in East Texas and going to high school.
 Iain Armitage stars as young Sheldon, alongside Zoe Perry, Lance Barber, Montana Jordan, and Raegan Revord.
 Jim Parsons, who portrays an adult Sheldon Cooper on "The Big Bang Theory", narrates the series and serves as an executive producer.
Penny is a fictional character on the American CBS sitcom "The Big Bang Theory", portrayed by actress Kaley Cuoco.
 She is the primary female character in the series, befriending her across-the-hall neighbors Leonard Hofstadter (Johnny Galecki) and Sheldon Cooper (Jim Parsons), two physicists who work at the nearby California Institute of Technology (Caltech).
 Penny's lack of advanced education, but outgoing personality and common sense drastically contrast with the personalities of the primary male characters in the series, even though she is considered part of their group.
 She is the love interest of Leonard, with whom she maintains a brief romantic relationship during the third season, which is later resumed in the fifth season and culminates in an engagement at the end of the seventh season and a wedding at the start of season 9.
 Penny is the only main character of the show whose last name has not been revealed, although she has been occasionally referred to or addressed with the last name Hofstadter since her wedding.
Australian Idol was an Australian singing competition, which began its first season in July 2003 and ended its run in November 2009.
 As part of the "Idol" franchise, Australian Idol originated from the reality program "Pop Idol", which was created by British entertainment executive Simon Fuller.
 Australian Idol was televised on Network Ten for all seven series, and was broadcast on the Southern Cross Austereo Radio Network between 2005 and 2007.
 The program would follow a similar format to the earlier live talent performance show Young Talent Time, with on-screen judges, the main difference being the public could vote on contestants, and did not have a regular rotating cast.
Steven Molaro, also known as Steve Molaro, is an American television producer and writer.
 He has worked on such productions as "Freddie", "The Class", "Complete Savages" and the Dan Schneider-produced series "All That", "The Amanda Show", "What I Like About You", "Drake & Josh", "Zoey 101" and "iCarly".
 Since 2007, he has been a producer/writer on the sitcom "The Big Bang Theory".
, Molaro also co-created it's prequel spinoff, "Young Sheldon" with Chuck Lorre.
David Adam Javerbaum is an American comedy writer.
 Javerbaum has won 13 Emmy Awards in his career, 11 of which he received for his work on "The Daily Show with Jon Stewart".
 He ran the popular Twitter account @TheTweetOfGod, which served as the basis for his play "An Act of God", which opened on Broadway in the spring of 2015 starring Jim Parsons, and again in the spring of 2016 starring Sean Hayes.
Sheldon Lee Cooper, Ph.D., Sc.D.
, is a fictional character in the CBS television series "The Big Bang Theory" and "Young Sheldon", portrayed by actor Jim Parsons in "The Big Bang Theory" and Iain Armitage in "Young Sheldon".
 For his portrayal, Parsons has won four Primetime Emmy Awards, a Golden Globe Award, a TCA Award, and two Critics' Choice Television Awards.
 The childhood of the character is the focus of "Young Sheldon", the show being set in 1989, when 9-year-old Sheldon, who has skipped ahead four grades, starts high school alongside his older brother.
American actress, singer, and songwriter Emily Osment has appeared in music videos, films, and television series.
 Since 2014, Osment has starred as Gabi Diamond in the show Young & Hungry.
 In 2011, Osment starred in the movie Cyberbully, whose soundtrack includes the song Drift.
 Her other films include the role of Lilly Truscott in the Disney (2009), Dadnapped (2009), Kiss Me (2014); among others.
 In 2014, her song "In Case Of Fire" was part of the soundtrack of the film A Daughter's Nightmare, in which she is the protagonist.
"The Hawking Excitation" is the 21st episode of the fifth season of "The Big Bang Theory" that first aired on CBS on April 5, 2012.
 It is the 108th episode overall.
 After learning that Stephen Hawking is coming to lecture at Caltech, Howard (Simon Helberg) is hired to maintain his wheelchair equipment.
 When Sheldon (Jim Parsons) discovers this, he is desperate to meet Hawking.
 Howard says he can, but only if he completes a humiliating series of tasks.
"The Infestation Hypothesis" is the second episode of the fifth season of "The Big Bang Theory" that first aired on CBS on September 22, 2011.
 It is the 89th episode overall.
 In it, Sheldon (Jim Parsons) becomes worried when Penny acquires a new chair, while Leonard (Johnny Galecki) tries to make his long distance relationship with Priya work.
 The episode was watched by nearly 12 million viewers in the U.S. and received mixed reviews.
Leonard Leakey Hofstadter, Ph.D., is a fictional character in the CBS television series "The Big Bang Theory", in which he is portrayed by actor Johnny Galecki.
 Leonard is an experimental physicist, who shares an apartment with colleague and best friend Dr. Sheldon Cooper (Jim Parsons).
 For his portrayal, Galecki was nominated for a Primetime Emmy Award and a Golden Globe Award in 2011.