Article from NPR.com - May 9, 2005
Happy 50th Birthday, Kermit!

t's easy being green... when it's your birthday: Kermit the Frog turns 50 years old Monday. Barry Gordemer, Morning Edition senior producer and puppeteer, has this birthday tribute to the star of The Muppet Show and countless movies and videos.
A brief history of Kermit and Jim Henson is also available.

Kermit's own Happy Birthday MiceChat thread is here.