Birthday signs · Aries season
What zodiac sign is March 31?
Under the tropical zodiac, March 31 is set in Aries. Each noon UTC on March 31 in the 101 years from 1930 through 2030 finds the Sun in Aries, at 9.81° to 11.3° Aries. Day 10 to 12 of Aries season is March 31, located in the middle part and associated with the element fire.
Calculated across 1930–2030 · checked .
March 31 is Aries
| Aries at noon UTC | 101 of 101 years, 1930–2030 |
|---|---|
| Nearest change of sign | at least 9 days away |
| Birth time needed for the sign | no |
March 31 at a glance
| Sign | ♈︎ Aries, the Ram |
|---|---|
| Element and mode | fire, cardinal |
| Polarity | positive (masculine) |
| Ruler | Mars (traditional) |
| Sun on this date | 9.8° to 11.3° Aries at noon UTC, 1930–2030 |
| Day of the season | day 10 to 12 of Aries season |
| Decan | first (6 years) and second (95); faces: Mars, the Sun |
| Sidereal sign (Lahiri) | Pisces |
| Day number | 4 (modern numerology) |
Rulers: Ptolemy; modern list.6
The decan: middle Aries
| Noon Sun | 9.81° to 11.3° Aries |
|---|---|
| Decans | first in 6 years, second in 95 |
| Decan line crossed | 10° |
| Face rulers, Chaldean order | Mars, the Sun |
Faces after Lilly, in Chaldean order.3
March 31 by the numbers
| Day number | 4 (3 + 1 = 4) |
|---|---|
| Month-day number | 7 (3 + 4) |
| System | modern numerology, digit sums |
Digit sums as numerology guides give them.4
Where the date falls in the season
| Day of Aries season | 10 to 12 |
|---|---|
| Aries season opened | March 20 (20 years) or March 21 (77) or March 22 (4) |
| Aries season closed | April 19 (69 years) or April 20 (32) |
| Element and mode | fire, cardinal |
| Traditional ruler | Mars |
Seasons by the noon-UTC rule; rulers after Ptolemy.2
Born at this point in Aries season
Born on March 31, this person arrives at the seam where one stretch of Aries gives way to the next. Early spring pushes them to start things, while a steadier pull later asks them to finish. Many days feel split between leaving and staying. They know the moment when a plan turns from exciting to heavy, and they feel the pull to reconsider it before others notice.
Interpretation, not prediction.
The sidereal sign
| Sidereal sign, Lahiri ayanamsa | Pisces, all 101 years |
|---|---|
| Noon Sun, sidereal Pisces | 16.3°–17.7° |
| Convention | Indian (Vedic) astrology |
Ayanamsa convention.5
Born on March 31
- René Descartes (1596–1650), French philosopher, mathematician, and scientist
- Pope Benedict XIV (1675–1758), pope of the Catholic Church from 1740 to 1758
- Johann Sebastian Bach (1685–1750), German composer
- Joseph Haydn (1732–1809), Austrian composer
- Lawrence Bragg (1890–1971), Australian-born British physicist and X-ray crystallographer
- Octavio Paz (1914–1998), Mexican writer, poet an diplomat
- Al Gore (1948), Vice President of the United States from 1993 to 2001
- Ewan McGregor (1971), Scottish actor
Birth dates checked on Wikidata.7
March 31 in history
Observed on this date:
- Cesar Chavez Day (California, Washington (state))
- Freedom Day (Malta)
- International Transgender Day of Visibility
- King Nangklao Memorial Day (Thailand)
- Thomas Mundy Peterson Day (New Jersey, United States)
- Transfer Day (US Virgin Islands)
- World Backup Day
Events on March 31:
- 1146: Bernard of Clairvaux preaches his famous sermon in a field at Vézelay, urging the necessity of a Second Crusade. Louis VII is present, and joins the Crusade.
- 1905: Kaiser Wilhelm II of Germany declares his support for Moroccan independence in Tangier, beginning the First Moroccan Crisis.
- 1949: The Dominion of Newfoundland joins the Canadian Confederation and becomes the 10th Province of Canada.
- 1966: The Labour Party under Harold Wilson wins the 1966 United Kingdom general election.
- 2018: Start of the 2018 Armenian revolution.
How the answer was worked out
The tropical longitude of the Sun on March 31 was calculated at noon UTC for every year from 1930 through 2030 by Astronomy Engine, with each year's sign read from it.1 How the Machine works
Questions people also ask
What zodiac sign is March 31?
Among 101 sampled years from 1930 to 2030, March 31 is Aries in every case, counting the Sun at noon UTC.
Is March 31 on a zodiac cusp?
No. Between 1930 and 2030, the noon Sun stood in Aries on every March 31, and no March 31 lies within 9 days of a sign change.
What decan is March 31?
Two decans of Aries contain March 31: the first, the face of Mars, holds 6 sampled years, and the second, the face of the Sun, holds 95.
What is the birthday number for March 31?
Modern numerology gives March 31 a day number of 4 and a month-day number of 7, found by summing the digits.
Sources
- Astronomy Engine JavaScript reference — Don Cross, Astronomy Engine. Verified .
- Ptolemy, Tetrabiblos, Book I — LacusCurtius, University of Chicago. Verified .
- Decan (astrology): the faces of the planets (after Lilly) — Wikipedia. Verified .
- Life Path Number — Numerology.com (practitioner site). Verified .
- Ayanamsa (Lahiri and other sidereal conventions) — Wikipedia. Verified .
- Aries (astrology) — Wikipedia. Verified .
- Wikipedia: March 31 — Wikipedia (Wikimedia On this day feed); birth dates checked on Wikidata. Verified .