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Cusp birthdays fall in the narrow windows where the Sun crosses from one zodiac sign to the next. Here’s every cusp and its typical date range.
Strictly speaking, every birthday falls inside exactly one sign — the Sun is never in two places at once. But astrologers recognize that birthdays within a day or two of a sign change feel different from mid-sign birthdays. A Pisces-Aries cusp baby born March 20 may carry Piscean imagination alongside Arian drive; a Scorpio-Sagittarius cusp native born November 21 blends intensity with adventure.
Each cusp has its own character. Click any cusp above for the full personality profile, along with famous birthdays and links to year-exact data.
If you were born within any cusp window, use our calculator — it references NASA ephemeris data to tell you the precise sign for your exact birth moment.
Use Zodiac Sign Calculator →A zodiac cusp is the narrow date range where the Sun crosses from one sign into the next — typically three to five days wide. Astronomically, sign change happens in a single instant; culturally, cusp birthdays (like April 19–20) are said to carry energies of both neighboring signs.
No, you have only one Sun sign — determined by where the Sun was at your exact birth moment. But if you were born on a cusp, you may feel affinity for both signs. Your Moon sign, Rising sign, and other placements often explain this blend.
Use our zodiac sign calculator, which cross-references your birth date against NASA JPL ephemeris data for year-exact Sun ingress times. For absolute precision, include birth time.
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