I usually call my parents on their anniversary. The typical response is, "Oh, is it our anniversary today? I guess I should call your mother/father, huh?"
(They split time between two homes in two different states, so they're not always in the same state at the same time.) So, no, there will be no gift for their 30th (coming in January, maybe I should remind them now.) There were no gifts for any of the previous 29 anniversaries either.
As for my in-laws, Andrew and I used to call them as well. My MIL passed away two years ago, so the calls have stopped. They would have celebrated 45 years this year.