How quickly does my Monthly Membership become active after I sign up? Your Monthly Membership Pass starts the day that you make your purchase on site. When you arrive at the Park you will redeem your PDF at the outside Membership Processing windows to have a card made. Be sure and bring your valid ID. Was this article helpful? Related articles When does my LEGOLAND Pass Monthly Membership start? What Passes are on the Monthly Membership option? Can I use my day ticket as a joining fee for my Monthly Membership? How do I book room only with my annual pass discount at the LEGOLAND Castle Hotel?