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Tamil Calendar (Global)
Tamil Dates & Months · Viratham & Festivals
Understanding the Tamil calendar (Nirayana) System
This Sidereal (Nirayana) calendar utilizes astronomical logic to track the Sun's position relative to the fixed stars, accounting for Ayanamsam (the precession of equinoxes). Unlike Western calendars that follow the seasons, the Tamil calendar follows the stars, ensuring spiritual rituals align with cosmic reality.
Frequently Asked Questions
Tamil months begin when the Sun enters a new zodiac constellation. The exact timing varies based on your longitude. Syncing calculates the correct Tamil date for your location.
It is the mathematical difference between the Tropical and Sidereal zodiacs. It shifts by about 50.3 arc-seconds per year, keeping festivals synchronised with the constellations.
Eclipses are based on the alignment of Sun, Moon and Rahu/Kethu nodes. The 2029 cycle is unique, featuring 6 eclipses coinciding with major Tamil festivals.