Find your Hindu lunar birthday — your tithi, paksha and lunar month — for any year, free and private.
Your Janma Tithi is your Hindu lunar birthday — the lunar day (tithi) and fortnight (paksha) in the lunar month when you were born. Unlike your English birthday, which is fixed, your Janma Tithi falls on a different Gregorian date every year, exactly the way Diwali, Janmashtami and Rama Navami move. This is the day traditionally observed for janma-tithi puja, ayushya homa and milestone ceremonies.
🌙 Calculate my Janma Tithi for any year →Everything runs in your browser — no account, and no birth data ever leaves your device.
A lunar year is about 354 days — roughly 11 days shorter than the 365-day solar year. So your tithi birthday drifts about 11 days earlier in the Gregorian calendar each year, until a leap month (Adhika Masa) every ~3 years pulls it back. Over 19 years (the Metonic cycle) it returns almost exactly to where it began.
| Shukla Paksha (waxing) | Krishna Paksha (waning) |
|---|---|
| Pratipada → Purnima (full moon) | Pratipada → Amavasya (new moon) |
Each fortnight runs Pratipada, Dwitiya, Tritiya, Chaturthi, Panchami, Shashthi, Saptami, Ashtami, Navami, Dashami, Ekadashi, Dwadashi, Trayodashi, Chaturdashi, and ends in Purnima (bright) or Amavasya (dark). Each tithi spans 12° of the Moon's angle from the Sun.
Is Janma Tithi the same as my rashi or nakshatra?
No. Your Janma Tithi is the lunar day and fortnight of your birth. Your rashi is your Moon sign and your nakshatra is your birth star — the constellation the Moon occupied. This calculator gives you the tithi; the nakshatra finder gives you your star.
Do I need my exact birth time for the tithi?
For most people a rough time is fine. A tithi lasts 20–26 hours, so any time within a few hours usually gives the same result. It only matters if you were born close to a tithi boundary, and the tool warns you when that is the case.
Which calendar convention does this use?
It uses the Amanta (new-moon-ending) month convention standard in South and West India, with the Lahiri ayanamsa. A North-Indian Purnimanta month-name option is available for those born in the waning fortnight.