10am–1pm Third Annual Mamaroneck Monarch Butterfly Festival Ages: AllEnvironment Festivals Harbor Island ParkMamaroneck
Noon–2pm Fiesta Latina Ages: AllFree History & Culture Haverstraw King’s Daughters Public Library Village BranchHaverstraw
3–5pm Drop-in Days at Hoff-Barthelson Music School Ages: AllFree Music Hoff-Barthelson Music SchoolScarsdale
Tomorrow, 10 am Tree Journals: Exploring the Life of Trees at the Hudson Park Children’s Greenhouse Hudson Park Children’s Greenhouse
Brooklyn Paper Officials break ground on second phase of Kingsland Commons, bringing hundreds of affordable homes to Greenpoint