The March Equinox, occurring around March 20, marks an astronomical transition when day and night reach nearly equal lengths in many parts of the world. This seasonal milestone signals the beginning of spring in the Northern Hemisphere and autumn in the Southern Hemisphere. March 20 provides an opportunity to appreciate changing daylight patterns, seasonal landscapes, and the rhythms of nature. Its Environment dimension encourages awareness of seasonal changes and ecological cycles, while Festivities can include cultural and community activities inspired by the arrival of a new season. Across the United States, the equinox offers a natural occasion to observe longer days, changing weather, and the gradual emergence of spring.