Birthdays · March

March 31 birthdayZodiac sign, famous birthdays, personality and your 2027 numbers

The short answer

March 31 is an Aries birthday in the second decan of Aries with birthday number 4 and a Personal Year 9 in 2027; Johann Sebastian Bach (1685), René Descartes (1596) and Joseph Haydn (1732) were born on March 31 too.

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March 31 zodiac sign: Aries

Sun sign: Aries
Sun at noon UTC: 9.9° to 11.3° Aries
Decan: Second of Aries, 10° to 20°
Element and mode: Fire, cardinal
Ruling planet: Mars

In every one of the 91 years from 1940 to 2030 the Sun stood in Aries for the whole of March 31, in every time zone on Earth, between 9.9° and 11.3° of the sign at noon UTC, so a March 31 birthday is an Aries birthday whatever the year or the hour.

At noon UTC on March 31 the Sun is in the second decan of Aries in 88 of those years and in the first in 3, so the decan, like the sign at a cusp, turns on the year. The second decan of Aries is a face that belongs to the Sun in the Chaldean order and is read through Leo, ruled by the Sun, by triplicity, so the two systems agree, and in most years the decan runs from March 31 to April 9, and March 31 is its first day.

In most years March 31 is the 11th day of the Sun’s season in Aries, which runs from March 21 to April 19 counted at noon UTC, with 19 days of it still to come. March 31 is the 90th day of a common year and the 91st of a leap year, with 275 days of the year still to come after it.

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Famous March 31 birthdays

The earliest born of the twelve is Pope Pius IV, in 1499, and the most recent Ewan McGregor, in 1971; two of them were born after 1949.

Born since 1950

Ewan McGregor (born 1971), Scottish actor
Angus Young (born 1955), Australian guitarist

Born from 1900 to 1949

Carlo Rubbia (born 1934), Italian particle physicist
Shin'ichirō Tomonaga (1906–1979), Japanese physicist
Christopher Walken (born 1943), American actor

Born in the 1800s

Lawrence Bragg (1890–1971), Australian-born British physicist and X-ray crystallographer

Born before 1800

Johann Sebastian Bach (1685–1750), German composer
René Descartes (1596–1650), French philosopher, mathematician, and scientist
Joseph Haydn (1732–1809), Austrian composer
Pope Benedict XIV (1675–1758), pope of the Catholic Church from 1740 to 1758
Pope Pius IV (1499–1565), pope of the Catholic Church from 1559 to 1565
Henry II of France (1519–1559), King of France from 1547 to 1559

Birthdays from Wikidata, checked against Wikipedia’s “On this day” births: the twelve best known of the 72 people the Almanac’s table keeps for March 31, by how many Wikipedia editions cover them, with dates before the calendar reform as the sources give them.

March 31 birthday personality

Both systems give the middle of Aries to the Sun, and by triplicity it borrows Leo’s warmth, so the ram’s impulse is read as wanting to lead from the front and be seen doing it. The tradition calls it a generous fire, quick to champion others, and asks only that pride not become the fuel.

The 31st adds 3 and 1 into 4, so numerology reads the creative and the independent settling into a builder’s discipline. It is a birthday linked with practical originality. In a fire sign the 4’s discipline is read as the hearth around the flame, the structure that lets a big energy burn for years rather than an evening.

A question to carry from March 31: what would your courage build if you gave it one hour, every day, for a month?

The Sun in Aries and the number 4 are only part of the story: your Moon, your rising sign and the rest of your chart have as much to say, and the tradition offers all this as a mirror, never a verdict.

Birthday number 4

Born on the 31st, 3 + 1 = 4, so your birthday number is 4: a 4 vibration supports structure, discipline, foundations, work, and stability, with structure and reliability as its gift and rigidity, fear, or over-control as its strain.

Your 2027 numbers

Pythagoras with a small lyre, pointing to a triangle of ten pebbles in his palm, an engraving — Pythagoras, the philosopher of number

For a birthday on March 31 the house method reduces the birth month and the day on their own and adds the Universal Year of 2027, 11 (2 + 0 + 2 + 7 = 11, a master number kept whole), as it stands: March, the 3rd month, gives 3, the 31st reduces to 4, and 3 + 4 + 11 = 18, which reduces to 9, so 2027 is your Personal Year 9.

A Personal Year 9 is read as a year of completion and release, when a nine-year round closes and makes room for the next. In a Universal Year 11 the tradition reads the endings as clearing the way for something more inspired.

Personal Months of 2027, a Personal Year 9: Jan 1 Feb 11 Mar 3 Apr 4 May 5 Jun 6 Jul 7 Aug 8 Sep 9 Oct 1 Nov 2 Dec 3

In 2027 March 31 falls on a Wednesday, the day the old reckoning gives to Mercury, and is a Personal Day 7 (3 + 31 = 34, then 7) in a Personal Month 3 (9 + 3 = 12, then 3), while February is a master month 11; the Personal Year itself turns on 1 January, not on the birthday.

March birthstone and birth flower

Birthstones: Aquamarine and bloodstone
Birth flowers: Daffodil, and jonquil as the second flower

March’s aquamarine and bloodstone come from the modern list (the Jewelers of America list of 1912, as since revised), and its daffodil and jonquil from The Old Farmer’s Almanac.

More birthdays

Common questions

What zodiac sign is March 31?

Aries: from 1940 to 2030 the Sun stayed in Aries for the whole of March 31 in every year and every time zone, 9.9° to 11.3° into the sign at noon UTC, so no birth year or birth time changes it.

Is March 31 a cusp birthday?

No: the Sun stays in Aries all day on March 31 in every year from 1940 to 2030, wherever on Earth the birth takes place, and the nearest cusp birthday is March 21, ten days earlier.

Who was born on March 31?

Among the best known people born on March 31 are Johann Sebastian Bach (1685–1750), René Descartes (1596–1650) and Joseph Haydn (1732–1809), with Lawrence Bragg, Pope Benedict XIV and Ewan McGregor and six more named on this page.

What is the birthday number for March 31?

4. Born on the 31st, 3 + 1 = 4, so your birthday number is 4: a 4 vibration supports structure, discipline, foundations, work, and stability, with structure and reliability as its gift and rigidity, fear, or over-control as its strain.

What is the 2027 Personal Year for a March 31 birthday?

9. For a birthday on March 31 the house method reduces the birth month and the day on their own and adds the Universal Year of 2027, 11 (2 + 0 + 2 + 7 = 11, a master number kept whole), as it stands: March, the 3rd month, gives 3, the 31st reduces to 4, and 3 + 4 + 11 = 18, which reduces to 9, so 2027 is your Personal Year 9.