PERSIAN PRIDE. Join the festivities of the ninth annual Persian Parade, celebrating the historical Persian New Year, Nowruz. Enjoy performances by bands, dance ensembles, marchers and more as they make their way down Madison Ave. Noon. Free. 38th to 26th Sts. 1-800-936-7818. BATTER UP! Celebrate the new season of the national pastime with “Baseball in the Bronx: Nine Innings of Bronx Baseball,” a month-long exhibit filled with talks, photos and screenings. Today, Arlene Howard and Ralph Wimbish, co-authors of the memoir “Elston and Me: The Story of the First Black Yankee,” sign books. 3 p.m. Free. Bronx Museum, 1040 Grand Concourse, at 165th St., Bronx. (718) 681-6000. MUSIC FOR THE MASSES. Visit the beautiful St. Patrick’s Cathedral for the “Kilgen Organ Recital Series,” which invites organists from all over to play a 30-minute concert. David Kevin Lamb from Columbus, Ind., takes his turn. 4:45 p.m. Free. 460 Madison Ave., at E. 51st St. (212) 753-2261. MAD ABOUT ’ZINES. Dive into the weird and wonderful world of self-published magazines at the Brooklyn Zine Fest 2012. There will be more than 60 exhibitors, a DJ and food and drinks for sale. 11 a.m.-6 p.m. Free. Public Assembly, 70 N. Sixth St., Brooklyn….