Unlike the Drik (Thirukanitha) system, which relies on modern astronomical observations, Vakya panchangams use centuries-old constants to calculate celestial movements.

To ensure you are using the verified version of this Panchangam:

Raghunatha Iyer, with his kind eyes and gentle smile, welcomed Suresh into his modest home. Over steaming cups of tea, he began to explain the intricacies of Vakya Panchangam. As they sipped their tea, Raghunatha Iyer revealed that he had spent decades verifying and refining the Vakya Panchangam system.

Unlike modern "Drik" (or Thiruganitha) systems that use current astronomical observations, the is based on ancient mathematical formulas and mnemonic sentences (vakyas) passed down through generations.

“Vakya” and “Drig-Ganita” by L. V. S. MANI - Saptarishis Astrology

(or Thirukanitha) system, which uses modern astronomical calculations and ephemeris to match visible planetary positions, the Vakya system relies on traditional oral formulae passed down through generations. The "Pambu" Connection : The Raghunatha Iyer version is part of the broader Pambu Panchangam