This calendar is terrific. The ink gradually seeps through the page – filling one digit per day. It was designed by a guy named Oscar Diaz.
“Ink Calendar” make use the timed pace of the ink spreading on the paper to indicate time.
The ink is absorbed slowly, and the numbers in the calendar are “printed” daily. One a day, they are filled with ink until the end of the month. A calendar self-updated, which enhances the perception of time passing and not only signaling it.”