play4dPlay4D, from sggc IllumiNOW, is a set of standard playing cards with some additions.

The standard cards have a date component: year, month, day, or day of week added to the card faces. In addition, an additional 27 cards are used for various sorts of games.

The designer, Randy Cottingham, takes pains to say that the deck can be used to play numerous games. Although, since the years go only until 2013, they appear to have a limited lifespan.

Randy will have a display booth at BGG.con 2009.