11 a.m. School children march against gun violence; P.S. 179 Playground, 468 East 140th St., Bronx.
2:30 p.m. The New York State and city health commissioners donate blood; New York Blood Center, 310 East 67th St.
8 p.m. Tenants and Lower East Side activists protest landlord eviction attempt; 47 East 3rd St.
7 p.m. The Long Island Pine Barrens Society celebrate victory against the proposed Broadwater energy project; The Inn at East Wind, Wading River.