In short
March birthdays from the 1st to the 20th are usually Pisces, and birthdays from about the 21st onward are Aries. The Sun enters Aries at the March equinox, which falls on the 19th, 20th or 21st depending on the year and time zone, so those days need a birth time.
On this page
- March 1 – 20
- Pisces
- March 21 – 31
- Aries
- Sign change
- Around March 21, varies by year
Which zodiac sign is March?
The March zodiac sign is Pisces for birthdays up to the 20th and Aries from about the 21st. The handover happens at the March equinox, one of the four turning points of the year.
In March the zodiac ends and starts again. Pisces is the twelfth sign, and Aries is the first. Few months hold such a sharp contrast.
The equinox month
In the Northern Hemisphere, March brings the first signs of spring. Snow gives way to mud, the evenings stretch, and around the 20th, day and night are close to equal.
The equinox marks an exact moment in the sky. The Sun crosses the celestial equator heading north, and astrologers define that point as 0° Aries. Every other sign is measured from it. So the Aries birthday season always begins with spring, and Pisces season always closes winter.
For most of the month, the Sun moves through the second half of Pisces. It sits near 10° on March 1 and reaches about 29° by the 19th or 20th. Then it crosses into Aries and starts climbing again.
The deep end of Pisces
A March Pisces planning their own birthday may have no plan at all. They have a feeling about who should be there, maybe a playlist, maybe a late call to an old friend at 11 p.m. The details sort themselves out, and somehow everyone has a good time.
Pisces is a mutable water sign. It soaks up atmosphere, feels the mood of a room and understands people faster than they understand themselves. Born later in the sign, March Pisces carry this with more depth and less naivety than the dreamy stereotype suggests.
They guard the things that matter most. In arguments they go silent instead of fighting, then send a long, heartfelt text the next morning. At work, they notice when someone is struggling and cover for them without being asked.
Structure is their usual struggle. Deadlines and paperwork drain them faster than they drain most people. A simple routine, held loosely, helps more than a rigid system.
The Aries spark
Around March 21 the mood turns. Aries is a cardinal fire sign ruled by Mars, the sign of beginnings, nerve and directness.
March Aries are born in the very first degrees of the zodiac, and it shows. They want to start things, like the project, the conversation or the trip. When a deadline looms, they would rather sprint the night before than plod along for a week. If a plan is not working, they say so out loud, usually in the first meeting.
In friendship, Aries shows up when you call and asks, “What do we do about it?” They forgive quickly and expect the same. In love, they want to be chosen clearly and with enthusiasm, and they lose interest when things get vague.
Patience is their growth area, especially with people who need time to warm up. Aries mistakes slowness for reluctance.
The March 19, 20 and 21 cusp
The Sun enters Aries at the equinox, and that moment drifts. In some years and time zones it falls late on March 19. In others it falls on the 20th or, less often now, on the 21st.
You are not half Pisces, half Aries. At the moment of your birth, the Sun was in one sign or the other. If your birthday falls in this window, enter your date, time and place in the birth chart calculator. The page on March 20 looks at that equinox birthday in detail.
Tone does carry over. A Sun at 29° Pisces is seasoned and close to the edge, already restless for something new. A Sun at 0° Aries is pure beginning, with a faint memory of Pisces’ softness.
March decans
March holds four decans across the two signs:
- Pisces, 2nd decan (about March 1–10): co-ruled by the Moon, from Cancer. Adds tenderness, memory and a strong pull toward home and family.
- Pisces, 3rd decan (about March 11–20): co-ruled by Pluto, from Scorpio. Adds intensity, privacy and emotional depth.
- Aries, 1st decan (about March 21–30): co-ruled by Mars, the sign’s own ruler. Aries at its most direct and competitive.
- Aries, 2nd decan (from about March 31): co-ruled by the Sun, from Leo. Adds warmth, pride and a flair for being seen.
A March 31 birthday sits right at the opening of that second Aries decan, around 10°. Our March 31 page goes into what that changes.
How to be sure
For March 1 to 18 you are Pisces, and for March 22 to 31 you are Aries, in any year. Between the 19th and 21st, your birth time and year decide.
Even outside the cusp, the calculator is worth a minute. Your Sun sign is one layer, and our guide to the big three shows how the Moon and Rising sign shape the rest. An Aries with a Pisces Moon, for instance, can be far gentler than the label suggests.
How March people celebrate
A birthday says a lot about a sign, and March holds two that celebrate in opposite ways.
Pisces birthdays run on feeling more than logistics. A March Pisces may want a small dinner with three people who know them well, a day alone near water, or a surprise they did not have to plan. They dislike big events where they have to perform being happy. The best gift is something handmade, or a note that shows you noticed something specific about them.
Aries birthdays are about doing. A March Aries might want an activity over a party, like a hike, a climbing gym, a race or a road trip on a whim. They like being celebrated clearly and early. A friend who calls first, before the crowd, scores big points.
For the year ahead, Pisces gains from one firm boundary, set early and kept kindly. Aries gains from finishing one thing before starting the next. Each runs against the sign’s habit, and that is where the help comes from.
Compatibility for March birthdays
Pisces. Pisces feels safest with water signs and well anchored by earth signs. Fire can feel exciting but scorching, and air can feel a little cool. The Pisces compatibility page covers each match.
Aries. Aries thrives with fire and air signs, which keep up with its pace and enjoy its honesty. Its opposite, Libra, offers balance and grace that Aries admires and sometimes resists. See Aries compatibility for the full list.
Around March
Early March continues the Pisces story from the February birthdays page. Late March leads into the April birthdays page, where Aries hands over to Taurus.
Questions
What zodiac sign is March?
March holds two signs. Pisces covers roughly March 1 to 20, and Aries begins around March 21 and continues into April. The exact date of your birthday decides which one is yours.
Is March 20 Pisces or Aries?
Usually Pisces, with the Sun in the very last degree of the sign. In years when the equinox falls on March 20 in your time zone, a baby born after that moment is Aries. Your birth time and year settle it.
Why does Aries start in March?
The zodiac is measured from the March equinox, when the Sun crosses the celestial equator heading north. That point is defined as 0° Aries. So Aries always begins with spring in the Northern Hemisphere, and the whole zodiac counts on from there.
Are March Pisces and March Aries very different?
Very. Pisces is a mutable water sign, receptive and imaginative, and March Pisces are born in its later, more seasoned degrees. Aries is a cardinal fire sign, direct and quick to act, and March Aries are born in its first, freshest degrees.
Do I need my birth time to know my March sign?
Only if you were born between March 19 and 21. For every other March birthday the sign is the same in every year. Birth time is still useful for finding your Moon and Rising signs.