A "cusp" refers to the transitional days between two zodiac signs. If you were born on the first or last day
of a sign, you might feel a blend of both energies. However, technically, the Sun can only be in one sign at
the exact moment of your birth. Calculating your full birth chart with the sun, moon, and rising calculator or birth chart guide will reveal your true, definitive Sun sign.
Tropical vs. Sidereal
Tropical Astrology (common in the West) is based on the seasons and the vernal equinox,
keeping the start of Aries aligned with Spring in the Northern Hemisphere.
Sidereal Astrology (used in Vedic astrology) aligns with the actual, current constellations
in the sky, factoring in the Earth's shifting axis over millennia. If you want to compare changing sky positions with these date ranges, open the planetary positions calculator.
Cosmic Events Calendar
Retrogrades (ephemeris-synced)
Mercury: Check current cycle in live ephemeris snapshot.
Venus: Check current cycle in live ephemeris snapshot.
Mars: Check current cycle in live ephemeris snapshot.
Eclipse Windows (ephemeris-synced)
Solar eclipse window: See live ephemeris snapshot for exact date and sign.
Lunar eclipse window: See live ephemeris snapshot for exact date and sign.
Quick answers
What are the zodiac sign dates?
Zodiac sign dates are the approximate Sun-sign ranges used in tropical astrology, starting with Aries around March 21 and ending with Pisces around March 20. Because the Sun changes signs at a specific time each year, people born near a cusp should verify with a chart calculator.
When does each zodiac season start?
Each zodiac season starts when the Sun enters a new sign, usually around the same calendar dates each year. Aries begins near the March equinox, Cancer near the June solstice, Libra near the September equinox, and Capricorn near the December solstice. Exact ingress times can vary by year.
Am I a cusp sign if I was born near two signs?
If you were born near two sign dates, you are not a blended cusp by default; your Sun is in one exact zodiac sign at the moment of birth. Use your birth date, time, and timezone in the Big 3 zodiac calculator to confirm your Sun sign.
What astrology dates should beginners track?
Beginners should track zodiac seasons, new moons, full moons, Mercury retrograde periods, and major planetary ingresses. Start with the moon calendar for monthly rhythm, then use current planetary positions to see which signs the planets occupy now.