1999

All real-world events that happened in 1999.

January

 * January 31 – aired for the first time.
 * Season 1 of started.

April

 * April 7 – Conner Rayburn, actor and guest star, was born.
 * April 9 – Isaac Hempstead Wright, actor and guest star, was born.
 * April 11 – aired for the first time.
 * April 18 – aired for the first time.
 * April 25 –  aired for the first time.

May

 * May 2 – aired for the first time.
 * May 9 – aired for the first time.
 * May 16 –  aired for the first time
 * Season 1 of ended.

September

 * September 23 –  aired for the first time.
 * Season 2 of started.


 * September 30 – aired for the first time.

October

 * October 9 – Will Shadley, actor and guest star, was born.

November

 * November 11 – Mary Kay Bergman, actress and guest star, died.

December

 * December 14 – Karley Scott Collins, actress and guest star, was born.
 * December 26 – aired for the first time.