Animal Discovery Days shine a spotlight on different animals at the National Zoo. Each day includes special demonstrations, activities and opportunities to learn about wildlife conservation. Here’s the 2019 schedule: March 20, World Frog Day; April 4, Bear Day along Asia Trail; and May 29, World Otter Day Animal; June 8, World Oceans Day; July 16, World Snake Day; Aug. 12, World Elephant Day; Oct. 20, Sloth Day; Nov. 14, Orangutan Caring Day; Dec. 4, International Cheetah Day. Animal Discovery activities are from 10 a.m. to 1 p.m. The Zoo is free; parking is $25. nationalzoo.si.edu.