It's, traditionally, one of Austin's more unique celebrations. We're talking about "Eeyore's birthday party"... Today he turns 51! Thousands of young and young at heart made their way to Pease Park. They all came out to cheer up the sad little donkey on his birthday. The tradition started back in 1963 by a U.T. professor. Besides all the fun.. the event raises money for non-profit groups in Austin. It wraps-up tonight.. at dusk.