This comprehensive guide explains how Vaishnava ThiruNakshatrams are determined and celebrated in 2026–2027, aligning devotion with precise nakshatra astronomy. It clarifies the sunrise rule, Drik versus Vakya Panchang differences, and regional month systems (Tamil solar months and lunar months). It enumerates the widely accepted star–month identities of the Alwars and Acharyas to help devotees compute…