Just received this promotional email.
Taronga are now using a form to take bookings, so can't confirm if the discount is being applied correctly.
No mention of dates.
We're pleased to let you know that we've partnered with Taronga Conservation Society Australia and are proud to support their mission to care for and conserve wildlife.
As a Citi cardholder, visit Taronga Zoo Sydney or Taronga Western Plains Zoo Dubbo and you'll enjoy 25% off full-price individual day tickets when you book online and pay using your Citi card.*
Simply use promo code at checkout: CITI25
25% discount applies to full-price individual day tickets only for Taronga Zoo Sydney or Taronga Western Plains Zoo Dubbo. Not valid with any other offer including Zoo Friends memberships or Gold Passes; Vivid tickets; Roar & Snore or Zoo Snooze; NRMA or RACQ tickets; family tickets; concession tickets or transport passes including Harbour City Ferries, Captain Cook, Manly Fast Ferry or attraction passes. Tickets must be purchased online via taronga.org.au . Only one promotion code per order may be used. Offer valid for Citi cardholders only. Paying guest may be asked to show a Citi card when entering the zoo.