“The big news today is the Sun leaving Virgo for Libra at 10:22AM ET. Happy birthday, Libra! Here’s what you need to know about the first day of any season — i.e., equinoxes and solstices — from an astrological point of view.
The first days of Spring, Summer, Fall and Winter correspond with the first day (or first degree) of Aries, Cancer, Libra and Capricorn, respectively (there are thirty degrees in each sign of the zodiac).
These four signs are called cardinal signs. Cardinal signs initiate. They come up with the idea and put it into action, which leads to necessary change. “Cardinal” suggests (from the Latin root of the word), “that on which something turns or depends.” So the first day/degree of a Cardinal sign is a turning point.
In astrology, the technical term for the first degree of any Cardinal sign is the “Aries Point”, just to confuse people who are not professional astrologers. In other words, the first day of Cancer, Libra, Capricorn and Aries is the Aries Point. The first day of Taurus (and the rest of the signs) is NOT at the Aries Point).
Equinoxes and solstices are also prominent. We make a fuss over them, right? In Japan, the first day of each season is actually a national holiday. How cool is that? Thus, in a horoscope, a planet or angle at the Aries Point needs to be prominent.