Cite
MLA
“Vedanga Jyotisha.” Hindu History, 2026, https://www.hinduhistory.in/vijnana/vedanga-jyotisha-calendar/. Accessed .
APA
Hindu History. (2026). Vedanga Jyotisha. Retrieved , from https://www.hinduhistory.in/vijnana/vedanga-jyotisha-calendar/
01A calendar for the yajna
The Vedanga Jyotisha survives in two recensions, 36 verses attached to the Rigveda and 43 to the Yajurveda, both carrying the name of Lagadha. Its unit is a yuga of five solar years, 1,830 days, containing 62 lunar months, so two extra months are added in each cycle. It counts tithis, places the new and full moons among the 27 nakshatras, and measures the day by a water-clock in nadikas. Everything is in service of the new-moon and full-moon sacrifices and the seasonal rites.
02The solstice it records
The text says the winter solstice falls when the sun and moon are at the start of Shravishtha (Dhanishtha), and the summer solstice in the middle of Ashlesha. Because the solstices slowly drift against the stars, astronomers have used this line to estimate when such an observation was true. Most calculations point to the second millennium BCE, but the result depends on how precisely the old observers fixed the stars, and estimates spread over several centuries. The site gives the observation; the date drawn from it is a modern calculation.
03What came after
The five-year yuga is simple and drifts by about a day every few years, so it could not last. The later Siddhantas replaced it with true planetary motion, long cycles and trigonometry. But the vocabulary of the Vedanga Jyotisha, tithi, nakshatra, the intercalary month, still runs every panchanga in Bharat. The Jain texts Suryaprajnapti and Jyotishkarandaka use the same five-year scheme, which shows how widely it was kept.
In the texts
- Vedanga Jyotisha (Rik and Yajus recensions)
- Suryaprajnapti