MARCH 20, 2010 SPRING EQUINOX
It's also International Astrology Day -- which should mean send your astrologer some flowers, but really means that today the Sun is in Aries and that's the beginning of the astrological wheel.
Equinox means equal -- so today, day and night are of equal length. It is also the day when the earth's axis is inclined neither away or towards the Sun. This happens every year in March and September. After that the definition gets very complicated.