Blood Drive Sunday, May 26, 8:00 am-1:00 pm. Give blood this May before the busy summer season begins. May is Trauma Awareness Month: one car accident victim can use up to 100 units of blood. To schedule an appointment call 1-800-RED CROSS or visit redcrossblood.org, sponsor code: StonybGahanna. Each donor will receive a free Red Cross t-shirt, a BOGO admission to the Zoo and be entered into a weekly drawing for 4 passes to Zoombezi Bay. In addition, donors with a valid email address on file will receive a $5 Amazon gift card.