Free tools · Family dates

Your family's tithi birthdays, star birthdays and shraddha dates, where you live

Enter a birth or a death once. See the day to keep it each year in your own city, following your family's tradition, with the reason for each date. Then add them all to your calendar.

  1. Choose your cityWhere you keep the dates now, not where they happened.
  2. Add each personA birth or a death, by date, or by the tithi or star if that's what you know.
  3. Keep them every yearSee this year's day with the reason, and add ten years to your calendar.

How the dates are worked out

A tithi is a lunar day: the time the Moon takes to gain 12° on the Sun. A star (nakshatra) is the Moon's place among 27 parts of the sky. Neither lines up with midnight, so the same tithi or star can fall on different days in India and in North America or Australia. This tool works them out for the city you keep the dates in, which is what your priest there would do.

The 30 tithis of a lunar month Fifteen tithis while the Moon waxes (Shukla paksha), from Pratipada to Purnima, the full moon, then fifteen while it wanes (Krishna paksha), from Pratipada to Amavasya, the new moon. Each tithi is the time the Moon takes to gain 12 degrees on the Sun. Shukla paksha (waxing) 1Pratipada 2 3 4Chaturthi 5 6 7 8Ashtami 9 10 11Ekadashi 12 13 14 15Purnima Krishna paksha (waning) 1Pratipada 2 3 4Chaturthi 5 6 7 8Ashtami 9 10 11Ekadashi 12 13 14 15Amavasya
The 30 tithis of a lunar month. Each is the time the Moon takes to gain 12° on the Sun: about 23½ hours on average, but anywhere from about 20 to 27. So a tithi can start at any hour, and the day it holds at sunrise depends on where you are.
The rules for each kind of date
  • Tithi birthdays fall on the day the birth tithi is in effect at sunrise, in the birth month. When it holds at two sunrises, the first is used, and the other is shown too.
  • Star birthdays (Tamil and Malayali) fall on the day the birth star is in effect at sunrise in the birth month. When it holds at two sunrises, the later day is used, and the other is shown too. If the star comes twice in the month, the second is used, as most families do.
  • Shraddha falls on the day the tithi of death covers the afternoon period (aparahna, the fourth fifth of daylight). If it covers the afternoon on two days, the day with more of it is used. A death in an adhika (extra) month is kept in the adhika month in years that have one.
  • Mahalaya shraddha is on the same tithi in the Pitru Paksha fortnight. Deaths on Purnima, Chaturdashi or Amavasya are remembered on Sarvapitri Amavasya (Chaturdashi is kept for sudden or violent deaths). Some families keep other days, such as Navami for a mother (Avidhava Navami); ask your priest.
  • North Indian months end at the full moon (purnimanta). South and West Indian months end at the new moon (amanta). The tithi is the same; only the month's name changes in the dark fortnight.
  • Tamil and Malayalam months follow the Sun: the Tamil month is the Sun's sign at sunset, and the Malayalam month is its sign three-fifths of the way through daylight.

When your priest may say a different day

Families and panchangs don't all follow the same rules. When a date is close to a cut-off, or families are known to differ, we show the other day with the reason. Please confirm important dates with your family priest.

These dates are worked out on your device from astronomical positions (checked against the Swiss Ephemeris and against Drik Panchang festival dates). Nothing you enter is sent to us or anyone else. Dates are a guide for planning and are not religious advice; see our disclaimer. City data from GeoNames (CC BY 4.0). Astronomy by Astronomy Engine (MIT licence).