Seasons are fundamental to how we understand climate and our environment. There are differences of opinion concerning the start of autumn. “In meteorological terms autumn begins September 1st, as each season is defined in a three month period.” Astronomers have another perspective based on the date of the seasons of celestial events, placing the official start of autumn on September 23. There is a third definition of the beginning of autumn which comes from Phenology. The National Wildlife Federation describes Phenology as “the study of periodic plant and animal life cycles. These are the changes in the natural world, such.