Seven days for the price of two tickets

[TreeOfLife]

Last year I purchased these tickets during an offer in tehir website and understood they had to be used by the end of Feb 2003.
However, I just noticed that the restriction was crossed out in the tickets I received. We are planning a visit to Orlando in December. Would anyone know what the thing about these tickets would be? Could I still use them in December this year or would I have to replace them?

Thanks