We remember the great Casey Kasem, who passed away on June 15, 2014. Thanks Casey for all the years of great shows and great music and for his great attitude and charity work. We'll always keep reaching for the stars!

American Top 40 debuted on July 4, 1970. Casey Kasem retired from countdowns in July 2009, but AT40 continues on, both in its current incarnation with host Ryan Seacrest and in replays of shows from the 1970s and 1980s. For over 40 years AT40 has brought listeners the world over the top hits in the USA.

This website celebrates the show by giving the timeline of events during each decade of the show's run. Learn more about the show by choosing a decade from the menu above. Much more information about AT40, Casey Kasem, and Shadoe Stevens can be found by visiting the links to the right.

These pages could not have been done without help from several websites. Please visit the credits and disclaimers page.