Tamil Calendar 2026 December — தமிழ் காலண்டர் 2026 டிசம்பர்

The Tamil month is solar: Chithirai opens when the Sun enters Mesha in mid-April and each month lasts as long as the Sun spends in one sidereal sign — 29 to 32 days, not the 29.5 of a lunation. There is no paksha, no adhika month and no kshaya month, because none of those belong to a solar reckoning. The day a month begins follows the Tamil rule: a sankranti before sunset opens the month that same day, one after sunset opens it the next.

Tithi and nakshatra are read at sunrise at Chennai, which is the moment that names a Vedic day. Sunrise differs across India by well over an hour, so the day a tithi names can differ between two cities — the times on this page are this city's, and are computed from the Swiss Ephemeris with the Lahiri ayanamsa, the same engine the rest of the site uses. Festival days follow each observance's own deciding moment: pradosh for Deepavali, nishita for Shivaratri, madhyahna for Ganesh Chaturthi, and sunrise for the rest.

Month names, weekday names and the section labels above are in தமிழ். Tithi and nakshatra names are in தமிழ், from the reviewed tables the site's other pages in this language use. Festival names appear in தமிழ் where that tradition has an established name and in English otherwise.

There is no PDF file to download: every date here is computed when the page is requested rather than exported once, so a file would start going stale the moment it was written. The month grid at the top of each month page prints on one sheet on its own — use the browser's Print and choose “Save as PDF” to keep a copy.