This IS NOT the last Calvin and Hobbes comic. In fact, this is not an actual Calvin and Hobbes comic at all. It was created by a writer just as speculation as to what the last comic could be.
Watterson announced in November of 1995 that he would be ending the comic. Later that month, Frank Ahrens, a Washington Post writer, wrote an article titled “SO LONG, KID – AN OBITUARY FOR A BOY, HIS TIGER AND OUR INNOCENCE”. The article was about the end of this great comic that so many have loved for so long and contained some conjecture as to what the last strip would contain. The comic above appeared in that article and was NOT created by Bill Watterson.
The actual last comic strip was upbeat and hopeful. It appeared on December 31st, 1995.