March 21 zodiac sign
Most years see the Sun at 0° Aries on March 21, the first degree of the zodiac, though in some it is still finishing Pisces when the day begins.
- Sun at 0°–2° Aries
- 1st decan · Mars
- Cusp birthday
March 21 in profile
This date belongs to Aries in most years and to Pisces in a minority, decided by the year and the hour of birth, with no in-between sign. At 0° Aries the Sun is at the spring equinox point, the raw start of everything, in the first decan where Aries is its own sub-sign and Mars rules twice. The Pisces version sits at the anaretic 29°, in the Scorpio decan, also under Mars. Both share one quality: an ending and a beginning pressed together, felt as restless energy.
Money comes and goes fast for the Aries version, spent on what can be used today: running shoes, a course, a flight. The Pisces version spends on feeling, on gifts and on rescuing friends, then wonders where the month went. Both dislike tracking every coin. A single automatic transfer on payday, set once and left alone, works far better for them than a detailed budget they would soon abandon.
Goals run high and impatient. They want to be first, or at least early, and they start projects with genuine fire. The challenge is the middle part, when novelty fades and the work becomes routine. Breaking a long goal into short sprints with a visible finish line suits both versions. A friend who checks in every few weeks on how the plan is going keeps the momentum honest.
Pisces or Aries?
The Sun moves from Pisces into Aries around March 21, and the exact moment shifts from year to year. Between 1930 and 2040 it happened during the UTC day of March 21 in 35 years out of 111, at a median of 05:22 UTC (02:14 UTC in births from 1980 to 2010). In 76 years it was already Aries all day. So a March 21 birthday is Pisces or Aries depending on the year and the time, never a blend of the two.
The Sun on March 21, year by year (UTC)
- 1970Aries from 00:56
- 1971Aries from 06:38
- 1972Aries all day
- 1973Aries all day
- 1974Aries from 00:06
- 1975Aries from 05:57
- 1976Aries all day
- 1977Aries all day
- 1978Aries all day
- 1979Aries from 05:22
- 1980Aries all day
- 1981Aries all day
- 1982Aries all day
- 1983Aries from 04:39
- 1984Aries all day
- 1985Aries all day
- 1986Aries all day
- 1987Aries from 03:52
- 1988Aries all day
- 1989Aries all day
- 1990Aries all day
- 1991Aries from 03:02
- 1992Aries all day
- 1993Aries all day
- 1994Aries all day
- 1995Aries from 02:15
- 1996Aries all day
- 1997Aries all day
- 1998Aries all day
- 1999Aries from 01:46
- 2000Aries all day
- 2001Aries all day
- 2002Aries all day
- 2003Aries from 01:00
- 2004Aries all day
- 2005Aries all day
- 2006Aries all day
- 2007Aries from 00:07
- 2008Aries all day
- 2009Aries all day
- 2010Aries all day
- 2011Aries all day
- 2012Aries all day
- 2013Aries all day
- 2014Aries all day
- 2015Aries all day
- 2016Aries all day
- 2017Aries all day
- 2018Aries all day
- 2019Aries all day
- 2020Aries all day
- 2021Aries all day
- 2022Aries all day
- 2023Aries all day
- 2024Aries all day
- 2025Aries all day
- 2026Aries all day
- 2027Aries all day
- 2028Aries all day
- 2029Aries all day
- 2030Aries all day
Calculated by Lunonis from the same ephemeris code as our charts (astronomy-engine, checked against Swiss Ephemeris): geocentric, tropical zodiac, true equinox of date. Times are UTC: add or subtract your time zone’s offset, which can move the change to the day before or after.
Your Moon sign depends on the year
The Sun is in the same place on March 21 every year; the Moon is not. It changes sign every two and a half days, so people who share this birthday can have any of the twelve Moon signs. Here is where it was on March 21 in recent years, from 00:00 to 23:59 UTC (an arrow means it changed sign during the day).
- 2017Capricorn
- 2018Taurus
- 2019Virgo → Libra
- 2020Aquarius → Pisces
- 2021Gemini → Cancer
- 2022Scorpio
- 2023Pisces → Aries
- 2024Leo
- 2025Sagittarius
- 2026Aries → Taurus
Compatible signs for an Aries
Sun-sign compatibility starts from the element. Aries gets on most easily with its own element and with the two sextile signs, and feels the strongest pull from its opposite. The full charts decide how a real pairing feels.
A gift for a March 21 birthday
A fresh-start kit for a goal they have named: a training plan with a race entry, a first lesson on a new instrument, or a starter set for a new skill.
Asked about March 21
What zodiac sign is March 21?
March 21 can be Pisces or Aries. The Sun changed from Pisces to Aries during this date in 35 of the 111 years from 1930 to 2040, so the answer depends on the birth year, time and place. The year-by-year list above shows when; a birth chart gives the exact answer.
Is March 21 a cusp birthday?
Yes. March 21 is one of the days the Sun leaves Pisces for Aries. People call it the Pisces–Aries cusp, but there is no blended sign: someone born before the change is Pisces, after it Aries.
What decan is March 21?
March 21 falls in the 1st decan of Aries. In the triplicity system we use, that decan belongs to Aries and its ruler Mars, which colours the Aries Sun with a little of Aries.
Your birthday is only the Sun
A March 21 birthday tells you where the Sun was. The Moon, the Rising sign and eight more planets each sit somewhere of their own, and they depend on the year, the hour and the place. The free calculator shows all of them.