How we calculate the panchang

Calculations follow Drik Siddhanta and Indian Standard Time. This is not astrological advice.

Drik Siddhanta

Tithi, nakshatra, yoga, and karana come from the Sun and Moon in the sky — not from midnight on the wall calendar. That is Drik (observed) ganita.

Sunrise and timezone

Each city uses its latitude and longitude for sunrise, sunset, moonrise, and moonset. Clocks are shown in Asia/Kolkata (IST).

Tithi, nakshatra, yoga, karana

Tithi from the Sun–Moon angle, nakshatra from lunar longitude, yoga from Sun+Moon, karana as half a tithi. Names are read at sunrise; end times are listed separately.

Rahu Kaal, Gulika, Yamaganda, Abhijit

These split the local day (sunrise to sunset) into eighths or fifteenths. Jaipur and Jodhpur therefore differ by minutes.

Ayanamsa & Ephemeris Specifications

Vedic signs are sidereal. Apna Panchang strictly employs the Lahiri / Chitrapaksha Ayanamsa (standardized by the Indian Calendar Reform Committee). Planetary positions are computed via high-precision VSOP87 analytics and lunar motion via ELP2000-82.

Chief Astrological Consultant & Reviewer

Pt. Acharya Satyendra Sharma — Senior Jyotish Acharya & Panchang Mathematician (Sampurnanand Sanskrit University, Varanasi; 28+ years experience). All algorithms and festival tables are reviewed by Suyog Academy's Vedic Research Division.

Verification & Audit

Ayanamsa: Lahiri (Chitrapaksha) · Ephemeris: VSOP87 / ELP2000 · Coverage: 296+ Indian cities · Last verified: September 2026.