12-5pm, free, Avenue C (E 6th to E 12th Sts), loisiadafest.org. The Loisaida Festival includes diverse manifestations of the Puerto Rican and Latinx cultures expressed through music, cuisine and arts. 2017’s theme is “Immigration,” recognizing and celebrating the immigrant and migrant experience on the Lower East Side—”The Gateway to America”—and these pioneers’ contributions.