Calendar Systems & Computations
The rigorous mathematical and observational frameworks of Indian chronometry: Vakya vs Drik, Ayanamsa precession, and Solar vs Luni-Solar calendars.
Vakya vs. Drik: The Great Indian Almanac Debate Explained
Why ancient mnemonic ephemeris tables differ from modern spherical trigonometry, and why both systems coexist in temple traditions.
Ayanamsa Explained: The Precession of Equinoxes in Indian Astronomy
Why the Tropical (Sayana) and Sidereal (Nirayana) zodiacs drift apart by 50.3 arcseconds annually, and how Lahiri / Chitra Ayanamsa is computed.
Solar vs. Luni-Solar Calendars: Sauramana, Amanta & Purnimanta
How Tamil/Kerala solar calendars sync with Telugu/Kannada Amanta and North Indian Purnimanta cycles, plus the leap month (Adhika Masa).
Your City’s Panchangam, Every Day
Many printed calendars are computed for one town. Nava Panchangam computes sunrise, sunset and the windows that depend on them, such as Rahu Kalam, for your city, with a choice of Vakya or Drik; a tithi’s ending instant is the same everywhere.
Open Live Panchangam →