Here’s an awesome way to add some spice to the cookie cutter calenders we see every day. The “Ink Calender” makes use of the time it takes for ink to bleed through paper and translates that into an evolving date that lasts all month. As the ink is absorbed by the paper, the day’s date is “printed” on the calender. The “Ink Calender” is available for every month of the year and the ink color is based on our temperature perception for each month. For example, the colors range from shades of blue in December, shades of green in spring, and oranges and reds during the summertime. The “Ink Calender” was developed by Oscar Diaz Studio for “Gradual “ at the London Design Festival 2007.