True sidereal astrology uses the actual constellations in the sky. You will notice a difference between these dates and the more popular Western astrology dates, aka tropical astrology. This is because tropical astrology does not use the constellations in the sky. It uses the seasons.
These dates are also different from Vedic and other common forms of sidereal astrology. Common sidereal systems use an even thirty degrees for each of the signs, while true sidereal uses the true size of the constellations. For example, Leo and Cancer are the same size in most sidereal systems. However, Leo is a very large constellation in the sky, while Cancer is very small. True sidereal astrology takes the actual size of the constellations into account.
To calculate this we use the midpoint system which uses the midpoints between constellations as the boundaries. This is the same as using a planetarium to see where the Sun is throughout the year. Learn more about the differences between the midpoint system and other forms of sidereal astrology.
(If you are within three days of another sign you are a blend of both.)
Aries (Apr 21 — May 12)
Taurus: (May 13 — Jun 19)
Gemini (Jun 20 — Jul 16)
Cancer (Jul 17 — Aug 6)
Leo (Aug 7 — Sep 14)
*Virgo (Sep 15 — Nov 3)
Libra (Nov 4 — Nov 22)
Scorpio (Nov 23 — Dec 6)
Ophiuchus (Dec 7 — Dec 18)
Sagittarius (Dec 19 — Jan 19)
Capricorn (Jan 20 — Feb 13)
Aquarius (Feb 14 — Mar 9)
Pisces (Mar 10 — Apr 20)
* Virgo spans the entire month of October
*** To see your complete true sidereal chart use the sidereal birth chart calculator
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