Kennywood has long been known for the ethnic and national heritage days it hosts throughout the summers, and this year the Asian Heritage Day will fall on May 13th. (Kennywood has also long been known for being a lot of fun.) Few details are available, but I did pull this flyer off the Pittsburgh Chinese Association of Science and Technology messageboard:
Also, I should probably mention the 55th Annual Pittsburgh International Folk Festival will be held at the Monroeville Convention Center the next weekend, from the 18th to 20th. The cost is $12 at the door. And very advanced notice for the McKeesport International Village Festival, August 14th to 16th.