Nature's CalendarInspired by a traditional Japanese calendar which divides the year into segments of four to five days, Nature's Calendar guides you through a year of 72 seasons as they manifest in the British Isles. From 'Snowdrops emerge' in the first days of January to 'Tree skeletons and sky' at the close of the year, each fleeting season is epitomised by some natural phenomenon, be it a plant coming into bud, a burst of birdsong, or a cobweb spangled by dew.