Sidereal Sun Sign Dates
Sidereal Aries Dates
April 14 to May 14
Lahiri (IAE 1985) ayanamsa · approximate dates for 2020 to 2050 · shifts ~1 day per 72 years
In the Lahiri sidereal zodiac, the Sun enters Aries on approximately April 14 and leaves on approximately May 14. Because the sidereal and tropical zodiacs are currently about 24 degrees apart, sidereal Aries corresponds to most of what tropical astrology calls Taurus. If you were born between roughly April 14 and May 14, your sidereal Sun sign is Aries.
Why does sidereal Aries start on April 14?
The 24-degree gap between the two zodiacs is called the ayanamsa. It accumulates because Earth's rotational axis drifts slowly backward through the constellations over a 26,000-year cycle. For the Sun, which moves about 1 degree per day, a 24-degree shift means the sidereal Sun is approximately 24 days behind its tropical position. The exact ingress date shifts about one day every 72 years as precession continues.
What if you were born on the cusp?
People born in the last few days of tropical Aries (roughly March 29 to April 19) are in the cusp zone for this transition. If your tropical Sun is in late Aries and close to the April 14 sidereal boundary, check your sidereal chart with a Lahiri calculator to confirm your sidereal Sun sign. For borderline dates, the exact ingress shifts by a day from year to year, and the precise solar crossing time within the day also matters.
Get your complete sidereal chart
The Sun sign dates above are approximate. Your full chart includes Moon, rising, and all planets in the Lahiri sidereal zodiac, plus the exact ayanamsa applied to your birth date.