Cusp
Glossary · Last updated: 2026-07-26
A cusp birthday falls near the day the Sun (or Moon) moves from one sign to the next. The exact switch time varies by year and time zone.
You are not two sun signs at once in standard Western astrology, the Sun occupies one sign at your birth instant. Uncertainty means verify the ephemeris.
Our boundary notices
When your birth date sits within a few days of a sign change, we show an as-of notice so you can confirm with birth time if needed.
Related
Main reading and tools
These are the main reading and calculator pages. Use them for a daily note, a birth-sign tool, or a pair check.
- Today's Horoscope hubAll twelve Western sun-sign daily pages, plus links into the seven-tradition reader.
- Horoscope & Zodiac CompatibilityTwo birth dates for Western, Chinese, and Vedic folk pairing, plus every sun-sign hub.
- Zodiac Sign CalculatorWestern sun sign from birth date, with element, modality, and ruler.
- Vedic Rising Sign CalculatorLagna estimate when you have birth date, time, and place.
- Vedic Moon Sign CalculatorJanma Rashi and nakshatra when birth time and city are available.