 Grab your broomsticks and wands, all you wizards. Harry Potter Day is back, Saturday, August 3rd, as the Nats take on the Brewers at 4.05, featuring the Mystery House jersey giveaway. 10,000 fans receive one of four jerseys. Slytherin, Gryffindor, Hufflepuff, Ravenclaw. Go to Nats.com slash Harry Potter for details and buy your tickets now. Read all the books.