How can the same shit happen to the same guy, uh, seven times?

Seriously, John McClane would really like to know.

Die Hard: Year One, vol.1
Reprints Die Hard: Year One #1-4 (2009). Takes place on July 4, 1976.
Die Hard: Year One, vol.2
Reprints Die Hard: Year One #5-8 (2009 – 2010). Takes place on July 13-14, 1977.
Die Hard
DVD. Takes place on December 24, 1988. John McClane and Al Powell first meet in this film.
A Die Hard Christmas: The Illustrated Holiday Classic
Book of the film
Die Hard: The Nakatomi Heist Board Game
Game of the film
Die Hard 2 – Die Harder
DVD. Takes place on December 24, 1990.
Die Hard with a Vengeance
DVD. Takes place in 1995.
Live Free or Die Hard
DVD. Takes place in 2007.
Chuck Versus Santa Claus
Episode 11 of Season Two of the tv series Chuck. Takes place on December 24, 2007. LAPD officer Al Powell appears in this episode (and is revealed to be the cousin of Big Mike Tucker, a series regular).
A Good Day to Die Hard
DVD/BluRay. Takes place in 2012.
A Million Ways to Die Hard
Graphic novel. Set on the 30th anniversary of the events of the first film.