“Since the Sun changes signs at a different time each year, it can vary by a day or so. In order to help people decide which horoscope to read in these offerings, they approximated the date that the Sun would change to the next sign. Some years, Gemini season starts on June 20, others on June 21. Because there are 365 days a year and 12 signs, you can’t evenly divide the year by 12 without having 5 days remaining.” Nevertheless, the AstroTwins don’t subscribe to cusp theory—here’s why. RELATED STORY: The Four Zodiac Elements + What To Know About Each Of course, that’s not to say you can’t have a combination of traits from different signs. After all, that’s what your birth chart is all about. A Scorpio-Sagittarius cusp, for example, might actually be a true Scorpio, but perhaps their Venus is in Sagittarius. As far as the sign the Sun was under while transitioning from one to the next, though, it’s never under both. “In order to know your Sun sign (and you only have one!),” the twins note, “you need your exact minute of birth, along with your time and date.” (You can map your birth chart with the twins’ handy natal chart generator if you haven’t already).
