Maybe it’s a function of having a preschooler who isn’t yet into wizardry, but I’m not at all up on Harry Potter, and it’s clear from the hoopla planned in Hogwarts (Harvard) Square tomorrow (July 20), that I’m in the minority.

In addition to free concerts by Harry and the Potters, Draco and the Malfoys, and the Hungarian Horntails, numerous Harvard Square businesses are participating in tomorrow’s Potterpalooza, which starts at 5pm and runs late enough for eager readers to line up to buy the 7th Harry Potter installment at 12:01am (July 21) at The Coop, The Harvard Bookstore, Curious George Books and Toys, and Newbury Comics. The Harvard Museum of Natural History also will continue to host its Harry Potter Scavenger Hunt (free with museum admission) through the end of the weekend.