Happy 30-something birthday, Harry Potter!
Himmel Park Library celebrated his birthday and promoted the release of Harry Potter and the Cursed Child with games, appearances by Hogwarts professors, cake and dress up.
Much like this party, Antigone and Barnes & Noble will have weekend celebrations for Harry's birthday and the release of the script book, which happens to be the same day. Some things you can do on his actual birthday on July 31: attend any of these Tucson events, read the books again, watch the movies again, or play quidditch.
Check out some photos from the party and others we found (using magic):

Curt Booth, in character as the half-giant Hagrid, reacts after tasting a "potion" from Prof. Snape's table at the Himmel Park Library party, "Happee Birthdae Harry Potter", heralding the upcoming release of the new Harry Potter book, Thursday, July 28, 2016, Tucson, Ariz. Kelly Presnell / Arizona Daily Star

Ryan Johnson, dressed as Draco Malfoy, gets his hands on a slimy bogsnotter, part of the festivities at the Himmel Park Library party, "Happee Birthdae Harry Potter", heralding the upcoming release of the new Harry Potter book, Thursday, July 28, 2016, Tucson, Ariz. Kelly Presnell / Arizona Daily Star

Katie Knoepfle has some help from Carly Fife on a proper knot in her tie while getting into character as Hermione, for the festivities at the Himmel Park Library party, "Happee Birthdae Harry Potter", heralding the upcoming release of the new Harry Potter book, Thursday, July 28, 2016, Tucson, Ariz. Kelly Presnell / Arizona Daily Star

Dobby the House Elf gets used as a temporary table as a fan tries to fill out one of the trivia quizzes part of the festivities at the Himmel Park Library party, "Happee Birthdae Harry Potter", heralding the upcoming release of the new Harry Potter book, Thursday, July 28, 2016, Tucson, Ariz. Kelly Presnell / Arizona Daily Star

Genna Gettig takes a break form filling out a quiz to tickle her mother, Jolene, with an improvised quill pen, part of the festivities at the Himmel Park Library party, "Happee Birthdae Harry Potter", heralding the upcoming release of the new Harry Potter book, Thursday, July 28, 2016, Tucson, Ariz. Kelly Presnell / Arizona Daily Star