Glossary · திதி · तिथि
What is Tithi?
A Tithi is a lunar day: the time it takes the Moon to gain 12 degrees on the Sun. There are 30 in a lunar month, 15 in the waxing half (Shukla Paksha) and 15 in the waning half (Krishna Paksha).
The name
Why it matters
Most festivals, fasts and ceremonies follow the Tithi in force at local sunrise or at a particular time of day. A Tithi can last from about 19 to 26 hours, so it doesn't line up with calendar days.
See today's Tithi for your city
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Questions people ask
What are Ekadashi, Amavasya and Purnima?
Ekadashi is the 11th Tithi of each half, a common fasting day. Amavasya is the new moon and Purnima the full moon.
Calculated by ChiChakra from real planetary positions (Astronomy Engine, sidereal zodiac with a Lahiri-style setting) · How we calculate · About ChiChakra. Solar timings use the geometric solar centre at 0° altitude without atmospheric refraction; upper-limb almanacs can differ by several minutes. Rahu and Ketu use mean nodes. Traditional guidance, not a guarantee or professional advice.