Celebrate Earth Day with a beach cleanup in Kailua. And don’t forget to bring a reusable water bottle, sunscreen and hat. Check in at 9:30 a.m., Kailua Beach Park, across from Buzz’s Steak House, to pick up supplies, water and snacks. Cleanup starts at 10 a.m. After the cleanup, Sustainable Coastlines Hawaii will host a thank you “Earth Day Festival” concert from noon to 3 p.m., featuring Mike Love and friends.