The ECOlogical Calendar is a calendar that celebrates the natural structure of the year. The ECOlogical Calendar highlights the primary division of the year, the 4 astronomical seasons. The calendar is divided into four seasons, each beginning with either a solstice or equinox. It also illustrates a multitude of other natural phenomenon in the northern hemisphere such as moon phases, daily variation between tides, meteor showers, seasonal constellations, visible planets, solar and lunar events, and much more. The ECOlogical Calendar is reconnecting the measure of time on Earth with nature.