This highly readable book will absorb, inform and entertain-nature and poetry lovers. Here is an ideal guide to understanding the fascinating backgrounds to approaching celebrations in twelve months and Four Seasons of time-mapping poetry. Without an understanding of the regularity of the motions of sun and moon to guide them, our remote ancestors could not plan ahead; their experience of time could have been no more than a succession of days and moons and seasons. Only after theyd learned to count and do simple arithmetic, and after many nights of careful observation of the heavens, did the calendar begin to take shape.