Castro burger joint Super Duper (2304 Market Street @ 16th) is celebrating its one-year anniversary and in honor of this special occasion, Mayor Ed Lee has declared today Super Duper Day! And what this means is FREE burgers.

Swing by Super Dupertoday, Thursday April 28th from 2-3pm, and get a free (Super Dupers’ burgers are 100% Niman Ranch all natural beef) burger. There’ll also be cake and music. Let the party begin!

On another note, I don’t know how a local restaurant managed to rope the mayor in on their anniversary, but with free burgers and cake you can’t complain.