On June 11, 2016 the Zoo will close at 4 p.m., as we will be preparing for our annual fundraising event. Ticket sales will cease at 3 p.m. on that day. Sorry for the inconvenience. Wild for the Planet April 23–May 22, 2016 10 a.m.–4 p.m. This inspiring new annual celebration of our one precious Earth and its inhabitants runs from Earth Day to Endangered Species Day.