August 21 Zodiac Sign: Leo
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- Date
- August 21
- Sun sign
- Leo
- Usual range
- July 23 to August 22
- Place in sign
- late, decan 3
- Sub-ruler
- Mars
- Element
- Fire
- Modality
- Fixed
- Ruling planet
- Sun
- Changeover
- No
- Constellation
- Leo
Born on August 21, the Sun sign is Leo. Noon UTC stays in Leo through the 41 years from 1992 to 2032, so the birthday itself does not split.
Leo dates are July 23 to August 22. August 21 falls in the late part of Leo. It is a fire sign, fixed, ruled by Sun. Warm, proud, happiest creating or performing.
August 21 sits within two days of a sign change on August 22 and August 23. If the birth was late on this date, check the year in the calculator rather than the printed range.
In 2024 at noon UTC, the Sun on August 21 is in the third decan of Leo, the late 10 degrees of the sign. The triplicity sub-ruler of that slice is Mars.
The constellation behind the Sun on August 21 is Leo. That is the true place of the Sun in the stars, and it is a separate fact from the astrological sign.
Moon, Rising, Mercury, Venus, and Mars still need a birth time and place. This page only settles the Sun sign.
Sign page: Leo. Check this birthday in the zodiac calculator.
Questions
What zodiac sign is August 21?
August 21 is Leo. These pages read the Sun at noon UTC, which is the same tropical sign the zodiac calculator reports for a birth at 12:00 UTC. From 1992 to 2032 that noon figure stays in Leo. Use a birth time in the calculator if you were born near a nearby changeover.
Is August 21 a cusp birthday?
No. Noon UTC on August 21 stays in Leo for every year checked. A sign change still sits nearby, on August 22 and August 23, so a late birth on this date can be worth a calculator check. The first and last days of July 23 to August 22 are the usual edge.
What is the August 21 star sign?
People searching for the August 21 star sign usually mean the Sun sign. On this page that is Leo, a fire sign, fixed, ruled by Sun, in the late decan with Mars as the triplicity sub-ruler. Leo dates are July 23 to August 22. The constellation behind the Sun is a separate fact.