WWE SmackDown! 2015

The first SmackDown! special aired April 29, 1999
SmackDown! debuts in regular time slot (on Thursdays) on August 26, 1999
The 100th episode of SmackDown! aired on July 19, 2001
SmackDown! changes names and nights to Friday Night SmackDown! on September 9, 2005
SmackDown! airs in High Definition for the first time on January 25, 2008
Smackdown! moves back to Thursday night on January 15, 2015