Earth Day is Sunday, but venues around the region aren’t confining their celebration of all things environmental to a single day.

For instance, Saturday is when an Earth Day Festival happens at McCook Point Beach in Niantic, where there will be everything from animals for folks to see and activities for kids to try. Music will come courtesy of, among others, Steve Elci and Friends and Geoff Kaufman.

On Monday, Waterford Public Library will host an Earth Day program of seed planting for ages 3 and up.

In between, though, on the official Earth Day, folks can do a guided hike of Alewife Cove (meeting at Garden Gateway entrance at Ocean Beach Park in New London); take hikes, greet animals and more at Denison Pequotsepos Nature Center; and participate in family activities and games at Diana’s Field in Lyme's Banningwood Preserve.

Earth Day Festival — 10 a.m. Saturday, McCook Park Beach, Niantic; with live animals, children’s activities and performances; free; (860) 444-9247.

Earth Day Walk — 5 p.m. Sunday, Ocean Beach Park, 98 Neptune Ave., New London; guided hike along the varied habitats of Alewife Cove; meet at the Garden Gateway en-trance; free; (860) 444-8916.

Earth Day Celebration — Sunday, Denison Pequotsepos Nature Center, 109 Pequotsepos Road, Mystic; 10 a.m., hike; 11 a.m.-3 p.m., meet animal ambassadors; 11 a.m.-3 p.m., recycled art at the Coogan Farm Art Barn; 1 p.m., tour of the Coogan Farm Giving Gar-den; 2 p.m., Coogan Farm hike; free; (860) 536-1216.

Family Fun Day — 11 a.m.-2 p.m. Sunday, Diana’s Field in Banningwood Preserve, 19 Town St., Lyme; family activities and games for Earth Day, sponsored by the Lyme Land Trust; rain date April 29; free; lymelandtrust.org.

Earth Day — 4 p.m. Monday, Waterford Public Library, 49 Rope Ferry Road; seed planting program for ages 3 and up with an adult; free; (860) 444-5805.