Zodiac Sign by Month: Which Sign Rules Your Birthday?

How Zodiac Signs and Calendar Months Align

Each zodiac sign covers roughly 30 days, but they do not line up neatly with calendar months. Most months contain the tail end of one sign and the beginning of another. The exact date a sign changes — called an ingress — shifts slightly each year because the Sun's movement is calibrated to the solar year, not the Gregorian calendar.

If your birthday falls within one or two days of a sign change, you are born on or near the cusp. To know your exact sign, check the precise ingress date for your birth year rather than relying on approximate date ranges.

January

January opens under Capricorn (December 22 – January 19). Capricorn is a cardinal earth sign ruled by Saturn, associated with ambition, discipline, and long-term structure. Birthdays from January 20 onward fall under Aquarius (January 20 – February 18), a fixed air sign ruled by Uranus, associated with individuality, innovation, and collective thinking.

February

February begins under Aquarius (until February 18). From February 19, Pisces takes over (February 19 – March 20). Pisces is a mutable water sign ruled by Neptune, associated with imagination, emotional depth, compassion, and spiritual sensitivity.

March

March opens under Pisces (until March 20). The spring equinox marks the beginning of Aries season, when the Sun enters Aries (March 21 – April 19). Aries is a cardinal fire sign ruled by Mars — the first sign of the zodiac, associated with courage, drive, and new beginnings.

April

April begins under Aries (until approximately April 19). Taurus begins around April 20 (April 20 – May 20). Taurus is a fixed earth sign ruled by Venus, associated with sensuality, patience, material security, and aesthetic pleasure.

May

May opens under Taurus (until approximately May 20). Gemini season begins around May 21 (May 21 – June 20). Gemini is a mutable air sign ruled by Mercury, associated with communication, curiosity, adaptability, and the exchange of ideas.

June

June begins under Gemini (until approximately June 20). Cancer season opens at the summer solstice, around June 21 (June 21 – July 22). Cancer is a cardinal water sign ruled by the Moon, associated with home, memory, emotional intuition, and nurturing.

July

July opens under Cancer (until approximately July 22). Leo season begins around July 23 (July 23 – August 22). Leo is a fixed fire sign ruled by the Sun, associated with creativity, confidence, generosity, and the desire to shine.

August

August begins under Leo (until approximately August 22). Virgo season starts around August 23 (August 23 – September 22). Virgo is a mutable earth sign ruled by Mercury, associated with precision, service, health, and the refinement of skill.

September

September opens under Virgo (until approximately September 22). Libra season begins at the autumn equinox, around September 23 (September 23 – October 22). Libra is a cardinal air sign ruled by Venus, associated with balance, beauty, partnership, and diplomacy.

October

October begins under Libra (until approximately October 22). Scorpio season opens around October 23 (October 23 – November 21). Scorpio is a fixed water sign ruled by Pluto (and traditionally Mars), associated with depth, transformation, power, and emotional intensity.

November

November opens under Scorpio (until approximately November 21). Sagittarius season begins around November 22 (November 22 – December 21). Sagittarius is a mutable fire sign ruled by Jupiter, associated with philosophy, travel, freedom, and the search for meaning.

December

December begins under Sagittarius (until approximately December 21). Capricorn season opens at the winter solstice, around December 22 (December 22 – January 19). Capricorn is a cardinal earth sign ruled by Saturn, associated with ambition, structure, and the patient building of lasting things.