Ok, I thought it wasnt going to be worth posting which special editions I have, but since there was more interest than I thought there was going to be, ill post the ones I have anyway.
Homocidical Psycho Jungle Cat
Theres treasure everywhere
The days are just packed
Lazy sunday pages
Sunday pages
also, I wore out a copy of "Scientific progress goes boink" so I have another one, and I also have doubles of "The revenge of the babysat" and I have every square version. So how long did Calvin and Hobbes stay in the newspapers? a decade? the most information I know about the time calvin lived in was the late 1980s(a strip where he advises his dad about "Dad campaign" slogans, like 'Vote dad in '88')
Edit: Photonwrangler, I believe he said "Its a magical world" and then in the next box he says "Lets go exploring!" while riding down the hill with hobbes on the tobbogan.
Edit again: I know those were the final words of Calvin because in the Sunday Pages, Watterson writes down something about the strip, like how he felt drawing it, what he liked about it, and under the one I described he says that it was the final strip of Calvin and Hobbes. I really wish he can come out with at least one more special edition.