1999

All events that happened in 1999.

January

 * 10th: "Viva Ned Flanders" aired for the first time.
 * 17th: "Wild Barts Can't Be Broken" aired for the first time.
 * 31st: "Sunday, Cruddy Sunday" aired for the first time.

February

 * 7th: "Homer to the Max" aired for the first time.
 * 14th: "I'm with Cupid" aired for the first time.
 * 21st: "Marge Simpson in: "Screaming Yellow Honkers"" aired for the first time.
 * 28th: "Make Room for Lisa" aired for the first time.

March

 * 8th: The Simpsons: Too Hot For TV was released on VHS for the United Kingdom.
 * 28th: "Maximum Homerdrive" aired for the first time.

April

 * 4th: "Simpsons Bible Stories" aired for the first time.
 * 11th: "Mom and Pop Art" aired for the first time.
 * 25th: "The Old Man and the "C" Student" aired for the first time.

May

 * 2nd: "Monty Can't Buy Me Love" aired for the first time.
 * 9th: "They Saved Lisa's Brain" aired for the first time.
 * 16th: "Thirty Minutes Over Tokyo" aired for the first time Season 10 ended.

June

 * 7th: The Simpsons: Go To Hollywood was released on VHS for the United Kingdom.

September

 * 26th: Season 11 started. "Beyond Blunderdome" aired for the first time.
 * 29th:, a French voice actor, died.

October

 * 3rd: "Brother's Little Helper" aired for the first time.
 * 11th: Bart Wars - The Simpsons Strike Back was released on VHS for the United Kingdom.
 * 24th: "Guess Who's Coming to Criticize Dinner?" aired for the first time.
 * 31st: "Treehouse of Horror X" aired for the first time.

November

 * 7th: "E-I-E-I-(Annoyed Grunt)" aired for the first time.
 * 8th: The Simpsons: Greatest Hits was released on VHS for the United Kingdom.
 * 14th: "Hello Gutter, Hello Fadder" aired for the first time.
 * 21st: "Eight Misbehavin'" aired for the first time.
 * 28th: "Take My Wife, Sleaze" aired for the first time.

December

 * 19th: "Grift of the Magi" aired for the first time.