That's why I always try to buy them in January. Get the 2019 pass, which is the same one they still sell in December 2019 that is good to Dec 2020. No punch = 2 year pass. I have run into a ranger at San Juan who saw it wasn't punched and did so for me. Of course, I had just purchased it "last week". But if it's hanging from your mirror and you aren't there, they can't do anything about it. And at least you tried, unlike the scofflaws in this thread who refuse to buy one. I figure it helps fund recreation and that is something I support. Most of the Forest service budget these days is taken up by firefighting to the detriment of other needs like recreation. I have an America the Beautiful pass this year so no Adventure pass for me...