Panchangam — Raghunatha Iyer Vakya

The "statements" were originally designed for easy memorization, making them accessible to scholars before the age of digital calculators.

: Relies on ancient, fixed mathematical formulas passed down through oral tradition. While it is the traditional choice for rituals and temple ceremonies (including those at major temples like Srirangam), critics note that it may not always reflect the exact current astronomical positions of planets. Drik (Thiruganita) System Raghunatha Iyer Vakya Panchangam

: Unlike the Drik Ganitha (Thirugannitha) system, which updates for modern planetary movements, the Vakya system relies on the Vakyakarana source book. which updates for modern planetary movements