Depending on your profession you might get an extra day, I work in an industry which has a "day"....didn't even realise, turned up to an empty office one day last year, was great. Free day to wander around, over indulge and re-appear asleep on the sofa later on. Seems to be any profession with a decent union has a day. Mine, although fairly unrelated to my job, fell under "Insurance workers day"
Other than that, no, nothing for the city specifically.