Each month features a different plant group or fossil wood locality with multiple photomicrographs. The dates for Arbor Days around the world are noted, so you'll know when to take some extra time for celebrating trees and their wood. This calendar gives some wood anatomist specific days you might want to observe -Ring-Porous Day, Vasicentric Parenchyma Day, and Tangential Section Day. If you want some whimsy in your life it helps to know when to observe Wombat Day, Lost Sock Memorial Day, Chocolate Cake Day, and Bug Bunny's Birthday.