The Sun is in exactly one sign at any instant, and the boundary moves by hours every year. These pages give the exact instant for each boundary so a cusp birthday resolves to one sign.
A zodiac cusp refers to the transitional period when the Sun appears to move from one zodiac sign into the next. Astronomically, the Sun changes signs at an exact moment, not over an entire day. Therefore, a person is always one sign or the other, never a blend. Precise birth data is essential to determine the true solar sign.
| Cusp | Calendar range | Sun enters second sign (2026) |
|---|---|---|
| ♓→♈ Pisces–Aries | March 18–22 | Mar 20, 2026, 14:46 UTC |
| ♈→♉ Aries–Taurus | April 18–22 | Apr 20, 2026, 01:39 UTC |
| ♉→♊ Taurus–Gemini | May 19–23 | May 21, 2026, 00:37 UTC |
| ♊→♋ Gemini–Cancer | June 19–23 | Jun 21, 2026, 08:24 UTC |
| ♋→♌ Cancer–Leo | July 21–25 | Jul 22, 2026, 19:13 UTC |
| ♌→♍ Leo–Virgo | August 21–25 | Aug 23, 2026, 02:19 UTC |
| ♍→♎ Virgo–Libra | September 21–25 | Sep 23, 2026, 00:05 UTC |
| ♎→♏ Libra–Scorpio | October 21–25 | Oct 23, 2026, 09:38 UTC |
| ♏→♐ Scorpio–Sagittarius | November 20–24 | Nov 22, 2026, 07:23 UTC |
| ♐→♑ Sagittarius–Capricorn | December 20–24 | Dec 21, 2026, 20:51 UTC |
| ♑→♒ Capricorn–Aquarius | January 18–22 | Jan 20, 2026, 01:45 UTC |
| ♒→♓ Aquarius–Pisces | February 17–21 | Feb 18, 2026, 15:52 UTC |
The concept of a zodiac cusp describes the boundary between two adjacent zodiac signs. This boundary is not a gradual fade, but an exact astrological degree. Each zodiac sign spans 30 degrees of the ecliptic, the Sun's apparent path around Earth.
According to OmenMe's Swiss Ephemeris calculations, the Sun enters a new sign at a specific time and date. For example, in 2026, the Sun enters Aries on March 20. This precise moment marks the end of Pisces and the beginning of Aries.
This means individuals born around these transition dates, often called "cusp babies," are sometimes unsure of their true solar sign. Their birth chart calculation requires their exact birth time and location. Without this data, their solar sign cannot be definitively determined if their birthday falls on a boundary day.
Traditional astrology does not recognize a hybrid "cusp sign." You are either born with the Sun in one sign or the other. For instance, you are either a Pisces or an Aries, but not a "Pisces-Aries cusp." The qualities attributed to cusp individuals often stem from planetary placements in both adjacent signs within their unique birth chart.
The zodiac is a band of constellations along the ecliptic, the apparent path the Sun takes through the sky over a year. Each of the 12 zodiac signs corresponds to a 30-degree segment of this path. The Sun's entry into a new sign is an instantaneous event, precisely calculated by astronomical ephemerides like Swiss Ephemeris.
For example, the Sun's ingress into Aries marks the vernal equinox in the Northern Hemisphere. This occurs at a specific second, minute, and hour. In 2026, the Sun enters Aries at 0 degrees Aries. This exact moment shifts slightly each year due to the Earth's orbit and the leap year cycle.
OmenMe's Swiss Ephemeris calculations confirm these precise transitions. For instance, the Sun enters Taurus around April 20 and Gemini around May 21. These dates are not fixed; they vary by a day or two depending on the year.
The idea of a "cusp" arises from the common practice of listing general date ranges for each sign. These ranges approximate when the Sun typically changes signs. However, only a full birth chart calculation can pinpoint the Sun's exact degree and sign at birth.
If you were born on a date near a sign transition, you need precise birth information to confirm your solar sign. Your birth time, date, and location are crucial for an accurate birth chart calculation. This data allows OmenMe to pinpoint the exact degree of the Sun at your moment of birth.
Even a difference of a few hours can shift the Sun into the next sign. For instance, if the Sun enters Taurus at 3 PM on April 20, 2026, someone born at 2 PM that day is still an Aries, while someone born at 4 PM is a Taurus. This precision is vital for accurate astrological readings.
Understanding your true solar sign provides clarity on your core identity and life purpose. It is the primary indicator of your ego and self-expression in astrological tradition. Do not rely on generalized date ranges if your birthday falls within the cusp period.
AI-assisted content grounded in Swiss Ephemeris data — see our methodology
A zodiac cusp refers to the approximate boundary dates between two zodiac signs. Astronomically, the Sun changes signs at an exact moment, not over a period of days. The term is commonly used for individuals born on these transitional days.
The dates when the Sun changes signs vary slightly each year. For 2026, OmenMe's Swiss Ephemeris calculations show ranges like March 18–22 for Pisces–Aries, April 18–22 for Aries–Taurus, and May 19–23 for Taurus–Gemini. These are approximate transitional periods.
No, there is no such thing as a "cusp sign" in traditional astrology. You are born with your Sun in one specific sign or the other, never a blend. The Sun's position is always at a precise degree within a single sign at your moment of birth.
To determine your true solar sign if born on a cusp, you need your exact birth date, time, and location. Use OmenMe's birth chart calculator with this information. It will pinpoint the precise zodiac sign and degree of your Sun at your birth moment.