Be careful. They expire 90 after you buy them online. I bought an AP and didn't know they expired. I was SOL. I just bought another for our June trip and they have an expiration date on them, along with 4 day hoppers online. I can check the date if you want.
I have seen several posts that are saying this, but I don't know where it is coming from. The prices generally go up once a year, in January I think, and they have already gone up this year. I wonder if this is just referring to the fact that the special tickets (adult for child's price and child free with adult) expire April 28.