The Vernal Equinox occurs around March 20 or 21 each year, marking the beginning of spring in the Northern Hemisphere. On this day, day and night are approximately equal in length due to the Earth's tilt and position in its orbit around the Sun. This event is significant in many cultures, often celebrated as a time of renewal and growth. During the Vernal Equinox, the Sun crosses the celestial equator, moving northward. This transition affects weather patterns and signals the end of winter. The equinox is also associated with various festivals, such as Ostara in pagan traditions and Nowruz, the Persian New Year.