Why are two dates when we have equal amounts of sunlight and darkness no matter where we live?

The two dates when we experience equal amounts of sunlight and darkness, known as the equinoxes, occur around March 21 and September 23 each year. This phenomenon happens because the Earth's axis is tilted relative to its orbit around the sun, causing the sun to be positioned directly above the equator during these times. As a result, day and night are approximately equal in length worldwide, regardless of geographic location.