Are there any restrictions or excluded periods? You'll be able to use your Merlin Annual Pass to visit the attractions whenever you like, subject to the operating calendars of each attraction. Please see our operating calendar HERE. Related articles What benefits does the Merlin Annual Pass include? I'm an Annual Pass Holder. Do I need to book? Do I have to pay for an under 2? Where do I redeem my BOGO/discount coupon online? Is the Merlin Annual Pass valid for admissions to Merlin attractions elsewhere in the world?