Born on March 31
March 31: Aries Zodiac & Famous People
The zodiac sign for March 31 is Aries. Famous people born on March 31 include Rene Descartes, Hiroshi Tachi — 2 notable figures in all, plus this day’s birthstone, birth flower and birthday rarity.
Philosopher · 1596–1650
Actor · b. 1950
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How many people share the March 31 birthday?
~930 thousand in the U.S., ~22 million worldwide
※ Rough estimate assuming birthdays are evenly distributed (published population figures).
The March 31 birthday profile
Zodiac
Aries
Birthstone
Aquamarine
Birth flower
Daffodil
Birth color
Spring Green
Rarity
#339/366
Weekday
Which day?
💎 Aquamarine (Courage, Serenity & Wisdom) · 🌸 Daffodil (Hope, Self-love & New Beginnings)
Aries traits
General traits of the sign March 31 falls under (3/21–4/19) — not a per-day personality or fortune.
Element
Fire
Modality
Cardinal
Ruling planet
Mars
A passionate, action-driven pioneer who charges straight at goals.
Associated strengths: Courageous, Energetic, Honest, Passionate
March 31's decan: 2nd decan (10°–20°, ~March 31–April 9) — sub-ruler the Sun (Leo)
Each sign splits into three 10° decans; the 1st is the sign itself, the 2nd and 3rd are sub-ruled by the same-element signs (a traditional rule; the boundary shifts ±1 day by year).
※ Traditional Western astrology attributes — for cultural interest, not a scientific claim.
🎂 Born on March 31?
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