Saturday, April 21, 9 a.m. – 1 p.m., is Central Austin Neighborhood Association’s (CANA’s) Spring Cleanup Day. CANA’s 16 square blocks are bordered by Austin Blvd. (W), Mason (E), Washington (S), and Corcoran (N). Equipment and supplies will be provided, but feel free to bring some or your own. Volunteers will meet at 9 a.m.…