Spring Eqinox

There are two equinoxes every year – in March and September – when the sun shines directly on the equator and the length of day and night is nearly equal.  Seasons are opposite on either side of the equator, so the equinox in March is also known as the Spring Equinox in the northern hemisphere. However, in the southern hemisphere, it's known as the Autumnal (fall) Equinox.