Source: Birthday cakes for pandas - Slashfood
The answer to the question is yes. Yes they do.
They also enjoy "ice cakes":
They also enjoy wearing birthday crowns.
Images of pandas I can legally use with my Facebook Timeline
The Chive's "Terms and Conditions" require you to acquire a Panda Bear from China and name it John.
Panda Bathing in Hot Springs gif
Hungry panda eager for feeding time, 2006 photo