Ummm...wow! This ink calendar, by Oscar Diaz, is currently just a prototype, but what an incredible idea! Making use of the timed pace of the ink spreading on the paper to indicate each passing day, this calendar is meant to enhance the perception of time passing as a result of its self-updating design. The choice of ink color for each month has also been taken into consideration, ranging from dark colors in the fall and winter, such as this purple for October, shades of green in the spring, and on to oranges and reds for the summer.
(Via Ladies & Gentlemen)