Adam Sporka’s 2008 Thumb Calendar is now available! This cool little two-sided design is interactive, as to read it you need to cover the dates on either side of the header bars with your thumbs. (If that doesn’t make any sense, Adam provides a visual tutorial on Flickr.) Simply print one off, cut it out, fold it in half and you’ve got yourself a handy, business-card-sized calendar. Pic courtesy of Adam’s home page.