: While modern systems use computer-aided ephemeris, a 1995 Vakya chart follows the ancient Siddhanta rules which do not account for the precession of the equinoxes or modern planetary corrections. Vakya vs. Thirukanitha

: Based on oral traditions and fixed formulas. It is still used by many Tamil temples today for traditional reasons. Drik Ganitha (Modern)

As a historical document, the is a classic example of adherence to tradition. It is best used for researching historical festival dates as they were observed by major temples at the time. However, for precise astronomical or birth chart calculations, modern astrologers typically favor the more precise Drig-Ganita calculations over the 1995 Vakya tables.