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? I am unable to make a reservation with my 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?