The equinox, occurring on March 20 this year, marks the point when day and night are nearly equal worldwide. Astronomically, it happens as the Sun crosses the equator, bringing a near balance between daylight and darkness. Synopsis The equinox, occurring on March 20 this year, marks the point when day and night are nearly equal worldwide. Astronomically, it happens as the Sun crosses the equator, bringing a near balance between daylight and darkness. Skywatchers are in... [5286 chars]