Birthday Parties Birthdays here at the Cincinnati Zoo are truly special and unique! We provide an experience and atmosphere you can only get at the zoo! As we only do birthdays on select Sundays, there are a limited number of spots so be sure to book as soon as possible to get your date! Our birthday parties are best suited for ages three to ten. Now booking for 2021 and 2022! Birthday parties are available on select Sundays in 2021 & 2022 from 11am-1pm or 2pm-4pm. Please fill out this form for more information and we will contact you!