The 60-year Tamil cycle, from Prabhava to Akshaya

The 60-year cycle

Alongside the day-by-day panchangam, tithi, nakshatra, yoga, karana, and vaara, the Tamil calendar carries a much slower cycle: the year itself has a name. Sixty fixed Sanskrit names, from Prabhava to Akshaya, follow one another in a fixed order called the Brihaspati cycle, after Brihaspati, the Sanskrit name for the planet Jupiter. When the 60th name, Akshaya, is reached, the cycle simply starts again at Prabhava.

This is different from the numbered years of the Gregorian or Kollam calendars. A Tamil year is Shobhakrithu the way an English year is 2026, the name is the primary label people use in panchangams, temple almanacs, and traditional documents, even though the Gregorian year is usually printed alongside it for convenience. The cycle has no year zero and no leap adjustment: it is a pure count of 60, repeating without interruption.

Why sixty years?

The number 60 is not arbitrary. It comes from watching two planets at once. Jupiter (Brihaspati in Sanskrit, often called Guru in Tamil usage) takes close to 12 years to complete one circuit of the zodiac, about 11.86 years in modern terms, which classical astronomers rounded to 12. Saturn (Shani) takes close to 30 years for the same journey, about 29.46 years, rounded to 30.

Track only Jupiter, and you get a 12-year cycle, the basis of the twelve-year Kumbh Mela cycle, among other regional reckonings. Track only Saturn, and you get a 30-year cycle. But watch both together, and the two return to their original starting points at the same time only once every 60 years, because 60 is the least common multiple of 12 and 30. The Brihaspati cycle is built on that shared return: one full cycle is exactly five orbits of Jupiter and exactly two orbits of Saturn.

All 60 names, Prabhava to Akshaya

The 60 names fall naturally into five sets of 12, each set corresponds to one complete orbit of Jupiter through the zodiac. The list below gives the year number, the Tamil form of the name as it appears in panchangams, and a Roman transliteration.

Years 1–12, Jupiter's first round

Years 13–24, Jupiter's second round

Years 25–36, Jupiter's third round

Years 37–48, Jupiter's fourth round

Years 49–60, Jupiter's fifth round

Where we are now

Puthandu, the Tamil New Year in mid-April, is when the cycle steps forward by one name. The year that opened at Puthandu 2026 is Shobhakrithu, the 37th name in the cycle. It followed Shubhakrithu (2025–26, the 36th name) and will be followed by Krodhi (2027–28, the 38th name).

How the year's name shapes daily life

The year's name is not decorative. At Puthandu, temples across Tamil Nadu and the diaspora hold panchangam vaasippu, a formal reading of the new year's panchangam by a priest or scholar, which sets out the year's ruling planet, its general character, and its expected effect on rainfall, harvests, health, and public affairs, sign by sign.

• Panchangam vaasippu, the ceremonial reading of the incoming year's panchangam at temples on Puthandu, forecasting the year's character from its name and ruling planet.
• Wedding invitations and horoscope documents, traditional invitations and birth-chart paperwork still record the Tamil year name alongside, or instead of, the Gregorian year.
• Temple and family records, foundation dates, consecration ceremonies, and family milestones are traditionally logged by cycle year name.
• Everyday conversation, older generations in Tamil Nadu commonly refer to 'the year of Shobhakrithu' the way English speakers say '2026'.

More than two thousand years in continuous use

The 60-year cycle is one of the oldest calendrical systems still in active use. It is described in the Surya Siddhanta and other classical Sanskrit astronomical texts, and its use across South India long predates any surviving printed panchangam.

Stone inscriptions from the Chola and Pallava dynasties date temple grants, royal decrees, and construction records by the reigning king's regnal year together with the cycle year name, evidence that the same 60-name sequence, in the same order, has been tracked without a recorded break for well over a thousand years, and by most reckonings over two thousand.

One cycle, several calendars

Tamil Nadu is not alone in using this cycle. The same 60 Sanskrit names, in the same order, appear in Telugu, Kannada, and several other Hindu regional calendars, and in the pan-Indian Vikram and Shalivahana Saka traditions. What differs between regions is not the list of names but the starting line: because Tamil Nadu marks New Year at the solar Puthandu in mid-April, while Telugu and Kannada calendars mark it at the lunisidereal Ugadi in March or April, the two traditions can be one year name apart for part of the year. A panchangam printed in Chennai and one printed in Hyderabad may therefore disagree by exactly one name, not because the cycle is different, but because the two calendars start their year at different moments.