Born on August 21
Your Sun is in Leo, about 28° in — the third decan, where Leo's core takes on a Mars flavour. Here's what the date fixes, and what only your birth time can tell you.
Your sign: Leo
The fixed fire sign that brings warmth and refuses to be small.
A Leo Sun puts the Sun in its own sign — your core identity is amplified, radiant, and visible. You generate energy that other people warm themselves on. The friend whose laugh fills the room, the colleague who turns a project into something people are proud to be part of, the host who makes a dinner party an actual event — that's you, in your element.
- ElementFire
- ModalityFixed
- RulerSun
- SeasonJuly 23 – August 22
Your decan: the third decan of Leo
Each sign is divided into three 10° decans, and each decan has a sub-ruler that shades the sign's core. Degrees 20–30 of Leo belong to Mars: your drive — how you take action, what makes you angry, and what you fight for. Read it as Leo with a Mars accent — the fire core is unchanged, the emphasis moves.
Seven of Wands
Defence · Perseverance · Standing ground. The card assigned to this ten-degree slice of the zodiac — a birthday card in the same sense a sun sign is a birthday sign: one lens on the date, not a verdict.
Read the Seven of Wands in full on My Day Check →What the date can't tell you
The Sun is one placement out of ten. Your Moon sign changes every two to three days, so Leos born on August 21 in different years have different Moons; your rising sign changes every two hours and needs a birth time and place. Those two carry most of what people mean by "personality" in a chart.
Or browse the twelve possibilities: Leo Sun with each Moon →
Classic matches for an August 21 birthday
By sun sign, Leo pairs most easily with Aries, Sagittarius, Gemini, Libra. Sun-sign compatibility is the coarse layer; the couple reading compares both full charts.
Common questions
What zodiac sign is August 21?
August 21 is Leo, the fixed fire sign ruled by Sun. The Sun sits at roughly 28° Leo on this date, in the third decan.
What decan is August 21?
The third decan of Leo (20°–30°), sub-ruled by Mars. Decans divide each sign into three 10° slices; the sub-ruler adds a second flavour to the sign's core — here your drive — how you take action, what makes you angry, and what you fight for.
What tarot card is August 21?
In the Golden Dawn system each decan has a minor arcana card: for the third decan of Leo it is the Seven of Wands (defence, perseverance, standing ground). It's a birthday card in the same way a sun sign is — one lens, not a verdict.
Does everyone born on August 21 have the same chart?
No. They share the Sun in Leo, but the Moon changes sign every two to three days, the rising sign every two hours, and the outer planets by year. Two people born August 21 in different years can have almost nothing else in common in their charts.