The Cincinnati Zoo will be shining bright as we’re once again transformed into a “Wild Wonderland” for the 40th annual PNC Festival of Lights! We’re spreading Christmas cheer and making spirits bright this holiday season with the Tri-state’s longest-running holiday tradition – the 40th Annual PNC Festival of Lights. The event kicks off with a special member preview night on Thursday, November 17 when more than four million LED lights will illuminate the Zoo. The tree lighting ceremony starts at 6. more information Please note: Preview Nights are only open to Zoo members. The event opens to the public on Friday, November 18. Members can bring the same amount of guests included with their membership level. Members also have the opportunity to purchase up to two (2) half-price tickets in person at the Ticketing Windows. Tree lighting ceremony starts at 6.