Originally Posted by
Fangorn
Yes. To upgrade, you can go to Guest Services or to any ticket window at any park (including the water parks). You can upgrade from any regular type ticket to an AP. You will pay the difference between the value of the current ticket and the AP.
There is no financial advantage/disadvantage to upgrading on the first or last day. Your discounts and photopass downloads will start sooner if you do it on the first day as opposed to the last day, though.
Regardless of when you upgrade, the expiration date of the AP will be one year from the date of the first use of the ticket. If you use your 2-day pass on Oct 15 and then upgrade on Oct 16, the expiration date will be Oct 15, 2019, not the 16th.
Steve