Sahasra Chandra Darshan Calculator - 1000th Full Moon (Shatabhishekam)
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Frequently asked questions about Sahasra Chandra Darshan
Why is it celebrated at eighty rather than at a thousand months?
A synodic month averages 29.53 days, so a thousand full moons take about 80 years and 10 months. The ceremony therefore falls in the 81st year, which is why it is often described loosely as an eightieth birthday celebration. Counting the actual full moons is more precise than counting years.
Why not simply add eighty years to the birth date?
Because the lunar and solar years do not match, and the gap is absorbed by the extra lunar months (Adhik Maas) that occur roughly every three years. Counting real full moons from the ephemeris accounts for all of that, so the date can sit several months away from a plain birthday calculation.
Is Shatabhishekam the same thing?
Yes, it is the same milestone under a different name - Shatabhishekam in the south, Sahasra Chandra Darshan in much of the north, and Sahasra Purna Chandrodayam elsewhere. The ritual details vary by region and community, but all mark the thousandth full moon of a life.
Must the ceremony be held on exactly that day?
Rarely is it. Families normally choose a convenient auspicious day close to the calculated date, guided by a priest who checks the tithi, nakshatra and a suitable muhurat. The computed date tells you which season and roughly which week to plan around.
Is there a similar milestone earlier in life?
Yes. Ugrarath Shanti at sixty and Bhimaratha Shanti at seventy are observed in several traditions, and the sixtieth-year Shashtiabdapurthi marks a full cycle of the sixty-year Samvatsara calendar. Sahasra Chandra Darshan is the last and rarest of that sequence. The lunar day this count starts from is the Janma Tithi calculator; the ancestral tithi for the rite is Shraddh Tithi, and the full birth almanac is the Janma Panchang.
What is Sahasra Chandra Darshan?
Sahasra Chandra Darshan (Sanskrit: सहस्र चन्द्र दर्शन, "seeing a thousand moons"), also called Shatabhishekam or Sahasra Purna Chandrodayam, is the Hindu celebration of a person witnessing their 1000th full moon. One synodic month averages 29.53 days, so 1000 full moons span roughly 80 years and 10 months - the ceremony usually falls in the 81st year. It is a thanksgiving for a long life, not a medical forecast of longevity.
This calculator finds the first full moon after the date of birth, then the exact date of the 1000th Sun–Moon opposition using the Lahiri sidereal ephemeris. It shows the age on that day and the tithi, lunar month and nakshatra of that Purnima. Because it counts real full moons, it accounts for extra lunar months (Adhik Maas) across a lifetime, rather than pinning the rite to a fixed 80th birthday.
Families typically hold Shatabhishekam on an auspicious day around this Purnima, following their priest and regional custom. The computed date is an astronomical milestone, not a mandatory party day. If the person has health limits, follow a doctor's guidance for travel and fasting around the ceremony.
Enter the date of birth and pick the city if you want local Panchang labels on that Purnima. The tool is free; you can share the result or save a PDF. For today's Moon and tithi, use the daily Panchang. Editorial pages are reviewed by Astro Arpita Nath.
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