Question: On what date did the episode of "The Simpsons" that made allusions to one of the most famous hoaxes in United States history air?

Context articles: Lisa the Skeptic
1988–89 North American drought
Simpsons Roasting on an Open Fire
Four Great Women and a Manicure
SAT Subject Test in United States History
You Kent Always Say What You Want
Cardiff Giant
The Simpsons 138th Episode Spectacular
Jeff Carnazzo
National History Bee and Bowl

"Lisa the Skeptic" is the eighth episode of "The Simpsons"<nowiki>'</nowiki> ninth season.
 It first aired on the Fox network in the United States on November 23, 1997.
 On an archaeological dig with her class, Lisa discovers a skeleton that resembles an angel.
 All of the townspeople believe that the skeleton actually came from an angel, but skeptical Lisa attempts to persuade them that there must be a rational scientific explanation.
 The episode's writer, David X. Cohen, developed the idea after visiting the American Museum of Natural History, and decided to loosely parallel themes from the Scopes Monkey Trial.
 The episode also makes allusions to actual hoaxes, such as the Cardiff Giant.
 The episode received generally positive reviews.
The North American Drought of 1988 ranks among the worst episodes of drought in the United States.
 This multi-year drought began in most areas in 1988 and continued into 1989.
 The drought caused $60 billion in damage ($120 billion in 2014 United States dollars, adjusting for inflation).
 The drought occasioned some of the worst blowing-dust events since 1977 or the 1930s in many locations in the Midwestern United States, including a protracted dust storm, which closed schools in South Dakota in late February 1988.
 During the spring, several weather stations set records for lowest monthly total precipitation and longest interval between measurable precipitation, for example, 55 days in a row without precipitation in Milwaukee.
 During the summer, two record-setting heat waves developed, similar to those of 1934 and 1936.
 The concurrent heat waves killed 4,800 to 17,000 people in the United States.
 During the summer of 1988, the drought led to many wildfires in forested western North America, including the Yellowstone fires of 1988.
 At its peak, the drought covered 45% of the United States.
 While covering less area than the Dust Bowl, which covered 70% of the United States, the drought of 1988 ranks as not only the costliest drought in United States history but also the costliest natural disaster in United States history before Hurricane Katrina.
 In Canada, drought-related losses added to $1.8 billion (1988 Canadian dollars).
"Simpsons Roasting on an Open Fire", also known as "The Simpsons Christmas Special", is the series premiere episode of "The Simpsons".
 It was the first episode to air despite originally being the eighth episode produced for season one.
 It is the only full-length episode to air during the 1980s, having originally aired on the Fox network in the United States on December 17, 1989.
"Four Great Women and a Manicure" is the twentieth episode of the twentieth season of "The Simpsons".
 First broadcast on the Fox network in the United States on May 10, 2009, it was the second Simpsons episode (after "Simpsons Bible Stories") to have four acts instead of the usual three.
 The episode tells four tales of famous women featuring "Simpsons" characters in various roles: Selma as Queen Elizabeth I, Lisa as Snow White, Marge as Lady Macbeth and Maggie as Howard Roark from Ayn Rand's "The Fountainhead".
The SAT Subject Test in United States History is the name of a one-hour multiple choice test given on United States History by The College Board.
 A student chooses whether to take the test depending upon college entrance requirements for the schools in which the student is planning to apply.
 Until 1994, the SAT Subject Tests were known as Achievement Tests; and from 1995 until January 2005, they were known as SAT IIs.
 Of all SAT subject tests, United States History is taken the second most, with 119,903 administrations in 2009.
"You Kent Always Say What You Want", formerly known as "Kent State Massacre", is the twenty-second episode of "The Simpsons"<nowiki>'</nowiki> eighteenth season.
 It originally aired on the Fox network in the United States on May 20, 2007 as part of the one-hour season finale, alongside the episode "24 Minutes"; a repeat took place on August 19, 2007.
 It was the milestone 400th episode of "The Simpsons" and was written by Tim Long.
 The episode guest starred Ludacris as himself and Maurice LaMarche as the Fox announcer.
 It was the last episode to air prior to "The Simpsons Movie" releasing into theaters on July 27, 2007.
The Cardiff Giant was one of the most famous hoaxes in United States history.
 It was a 10 ft purported "petrified man" uncovered on October 16, 1869, by workers digging a well behind the barn of William C. "Stub" Newell in Cardiff, New York.
 Both it and an unauthorized copy made by P.T. Barnum are still on display.
"The Simpsons 138th Episode Spectacular" is the tenth episode of "The Simpsons"<nowiki>'</nowiki> seventh season.
 It originally aired on the Fox network in the United States on December 3, 1995.
 As the title suggests, it is the 138th episode and the third clip show episode of "The Simpsons", after "" and "Another Simpsons Clip Show".
 While the "138th Episode Spectacular" compiles sequences from episodes throughout the entire series like the previous two, it also shows clips from the original Simpsons shorts from "The Tracey Ullman Show" and other previously unaired material.
 Like the Halloween specials, the episode is considered non-canon and falls outside of the show's regular continuity.
Jeff Carnazzo (/karnaːzoʊ/; born February 10, 1967) is an American football coach and the current head coach at Palma High School, a position he has held since 2000.
 Carnazzo previously served as the junior varsity linebackers coach before his time as varsity head coach.
 In his first year as coach, Carnazzo guided his team to a championship in Division I of the Central Coast Section.
 Along with his duties as head football coach, Carnazzo teaches United States History, Advanced Placement United States History, and Physical Education.
The National History Bee and Bowl (NHBB) are nationwide history quiz competitions for high school, middle school, and elementary students in the United States.
 Both the National History Bee and the National History Bowl were contested for the first time in the 2010-2011 academic year.
 Students first compete at regional qualifying tournaments, from which the top students advance to the National Championships for the History Bee and History Bowl, which are held each spring.
 The competitions were founded in June 2010 by David Madden, a former 19-day champion on "Jeopardy!", who serves as Executive Director for both The National History Bee and The National History Bowl.
 At high school level tournaments of the National History Bee and Bowl, students also have the opportunity to compete in the National Qualifying Exam of the United States Geography Olympiad.
 Beginning in the fall of 2013, NHBB also introduced the United States History Bee, a competition for high school students focusing solely on American history.