Treelendar proposes a new calendar that reconsiders the relationship between paper and tree. Every piece of paper was once a tree, and Treelendar shows users the seasonal color and the beauty of this tree day-by-day as if it wasn’t cut down to be made into this calendar. The action of tearing to move to next day alludes on the consumption of trees. With computer vision we analyzed the color composite of 365 photos of trees in a year and transformed them into pure color gradient. By flipping the calendar pages day by day, you see the color from brown to baby green to deep green to yellow to white. You think beyond the desk, feel the change of seasons and remember the sacrifice of this tree.