American Top 40 debuted on July 4, 1970. This year
the show celebrates its 41st anniversary. 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 41 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.