I received my 7 day PH tickets today from Undercover Tourist. I purchased these in May. However, the ticket says 1/28/17. There isn't an expiration date listed on the ticket. I'm planning on upgrading the tickets to an AP. I thought I was purchasing tickets that could be upgraded with the price difference after February 12th. Does the 1/28/17 date mean they're from old stock and I'd have to pay the pre Feb 12th 2017 upgrade cost?