OPEN: Tuesday - Sunday, 9am - 5pm, open some Monday holidays. Closed on Thanksgiving and Christmas days. CALM is a California specific zoo, botanic garden, and natural history museum. A visit to CALM takes you through the geologic and paleonto lic past of California into the present day diversity of native wildlife and habitats. CALM is home for 200 injured or orphaned animals, including some of California's endangered species.