Yes, there is one in the micro-park of a local town here in Western PA. (Mars, Pennsylvania).
This year, they celebrated the Martian New Year, and will continue to celebrate every 619 days.
NASA employees came down from Cleveland (Glenn) to make presentations, there was a street fair, model rocket launches and fireworks. The event felt like the 1960s all over again! Heck, the town looks like the 1960s all over again.
Unfortunately, no UFOs were spotted during the event.
I'm going to have to attend that sometime. Looks like a lot of fun!