Question: When did the show on which Peggy Hill was a character begin its run?

Context paragraphs:
King of the Hill: King of the Hill is an American animated sitcom created by Mike Judge and Greg Daniels that ran from January 12, 1997 to September 13, 2009 on Fox.  It centers on the Hills, a middle-class American family in the fictional city of Arlen, Texas.  It attempts to maintain a realistic approach, seeking humor in the conventional and mundane aspects of everyday life.

Peggy Mitchell: Margaret Ann "Peggy" Mitchell (also Butcher) is a fictional character from the BBC soap opera "EastEnders".  Peggy was initially played by Jo Warne when she first appeared in the episode broadcast on 30 April 1991, featuring in 10 episodes.  Peggy was reintroduced in 1994, recast to Barbara Windsor, who made her first appearance in the episode broadcast on 7 November 1994.  Peggy became a regular character, and Windsor played the role until she was forced to take a long break due to poor health and departed on 23 May 2003.  She returned for two episodes broadcast on 16 and 17 September 2004, before rejoining as a regular character on 8 September 2005.  Windsor announced in October 2009 that she would be leaving the show and departed on 10 September 2010.  Windsor returned to the show for guest appearances on 20 September 2013, 25 September 2014, 17 February 2015 (as part of the show's 30th anniversary celebrations; see EastEnders Live Week) and 15 January 2016.  She then appeared in six episodes between 9 and 17 May 2016 and the character was killed off.  Her voice is last heard in the following episode, on 19 May 2016.  Peggy's funeral aired on 4 July 2016.

Time for Terry: Time for Terry was an Australian TV series which ran in from 1964-1966.  It was a variety show that was hosted by English comedian and entertainer as well as jazz musician Terry O'Neill.  The show was a forerunner to such shows as "The Midday Show" and "Hey Hey It's Saturday", combining variety and music with game show elements.  The show was so successful for HSV7 that it launched a season of Night-time for Terry in 1966.  O'Neill had run a similar successful show in England called "The One O'Clock Show".  Amongst other highlights, the show was responsible for launching the careers of Pat Carroll and Olivia Newton-John, whose farewell to Australian television before leaving for England was broadcast on the show.  Terry's then wife Peggy Haig (sister of English comic actor Jack Haig) made frequent appearances as did their daughter Coral Kelly - later to become prolific television writer Coral Drouyn.  Terry was a remarkable talent although today few remember him.  He was from a long list of stars and entertainers who came to Australia with the Tivoli circuit and stayed.  O'Neil was a most unlikely host.  English teeth hardly what you could call handsome but he had a warm style.  He did the funny walks way before John Cleese.

Kathy Najimy: Kathy Ann Najimy (born February 6, 1957) is an American actress and comedian.  She is best known for voicing Peggy Hill on the animated television series "King of the Hill", and her roles as Sister Mary Patrick in the comedy film "Sister Act", Mary Sanderson in the comedy-horror film "Hocus Pocus", and Olive Massery on the comedy series "Veronica's Closet".

Bobby Hill (King of the Hill): Robert Jeffrey "Bobby" Hill (born September 29, 1984) is a character on the Fox animated series "King of the Hill" and is voiced by Pamela Adlon.  Bobby is the only child of Hank and Peggy Hill.

Peggy Hill: Margaret Joseph "Peggy" Hill (née Platter) is a fictional character in the Fox animated series "King of the Hill".

Katey Sagal: Catherine Louise Sagal (born January 19, 1954) is an American actress and singer-songwriter.  She is best known for her role as Peggy Bundy, Al's sarcastic, lazy, bon bon-eating wife, on "Married... with Children" and for her role voicing the character Leela on the animated science-fiction series "Futurama" from 1999 to 2003 and 2008 to 2013, as well as for starring on the show "8 Simple Rules" in the role of Cate Hennessy.  In the latter role, she worked with John Ritter until his death, leading to Sagal's taking over as the series lead for the remainder of the show's run.  Sagal has been married to "Sons of Anarchy" creator Kurt Sutter since 2004.  Currently, Sagal is a series regular on CBS's Superior Donuts.

Grand Haven Musical Fountain: The Grand Haven Musical Fountain is a synchronized display of water and lights in Grand Haven, Michigan located on Dewey Hill on the north shore of the Grand River, not far from the Grand's mouth at Lake Michigan and Grand Haven State Park.  Shows run nightly from Memorial Day through Labor Day.  Weekend shows run during the months of May and September.  Shows begin at dusk and run 25 to 30 minutes

The X Factor (Greece series 5): The X Factor is a Greek and Cypriot television music competition to find new singing talent.  The fifth series will begin airing on Skai TV and Sigma TV on April 27, 2017.  Sakis Rouvas returned to present the main show on Skai TV for the fifth time and with Evagelia Aravani returned on Auditions Shows, Bootcamp, Chair Challenge and in Backstage at the Live Shows.  Tamta was the only judge from the 4th series to return.  Giorgos Mazonakis, Giorgos Papadopoulos and Babis Stokas are the new judges in the series, replacing George Theofanous, Peggy Zina and Thodoris Marantinis.  For the first time in The X Factor Greece the winner will not be from the "Boys".

List of King of the Hill characters: King of the Hill is an American animated sitcom created by Mike Judge and Greg Daniels.  The main characters are Hank Hill, Peggy Hill, Bobby Hill, Luanne Platter, Dale Gribble, Bill Dauterive, Boomhauer, Kahn Souphanousinphone, and Elroy "Lucky" Kleinschmidt.

Supporting paragraphs: Peggy Hill King of the Hill
Answer: January 12, 1997