1990

All events in 1990.

January

 * 14th: "Bart the Genius" aired for the first time.
 * 15th: Henry Gammill, comic writer, was born.
 * 21st: "Homer's Odyssey" aired for the first time.
 * 28th: "There's No Disgrace Like Home" aired for the first time.

February

 * 4th: "Bart the General" aired for the first time.
 * 11th: "Moaning Lisa" aired for the first time.
 * 18th: "The Call of the Simpsons" aired for the first time.
 * 25th: "The Telltale Head" aired for the first time.

March

 * 18th: "Life on the Fast Lane" aired for the first time.
 * 25th: "Homer's Night Out" aired for the first time.

April

 * 15th: "The Crepes of Wrath" aired for the first time.
 * 22nd: "Krusty Gets Busted" aired for the first time.

May

 * 13th: "Some Enchanted Evening" aired for the first time. Season 1 ended.

October

 * 11th: Season 2 started. "Bart Gets an "F"" aired for the first time.
 * 18th: "Simpson and Delilah" aired for the first time.
 * 25th: "Treehouse of Horror" aired for the first time. This episode started the Treehouse of Horror series.

November

 * 1st: "Two Cars in Every Garage and Three Eyes on Every Fish" aired for the first time.
 * 8th: "Dancin' Homer" aired for the first time.
 * 15th: "Dead Putting Society" aired for the first time.
 * 22nd: "Bart vs. Thanksgiving" aired for the first time.
 * 30th: Magnus Carlsen, chess grandmaster and guest star, was born.

December

 * 6th: "Bart the Daredevil" aired for the first time.
 * 20th: "Itchy & Scratchy & Marge" aired for the first time.
 * 31st "The Bully" aired.