Once I purchase my Annual Pass, how long do I have to activate the pass? Annual Passes are activated immediately upon purchase and your 12-month commitment will activate from the day of purchase. Was this article helpful? Related articles When does my annual pass start and expire? Can two people share an Annual Pass? Does my Annual Pass include admission to SEA LIFE Aquarium and LEGOLAND Water Park? Does LEGOLAND California have free birthday admission? How Can I Contact You?