Festival date logic
Amavasya
अमावस्या
New Moon day - time for ancestor worship and introspection.
Direct answer
Amavasya date rule
Amavasya is a recurring Hindu observance calculated from its Panchang rule. Samvat explains the tithi, significance, and date logic.
Gregorian date
Recurring every lunar monthHindu date
AmavasyaObservance moment
the relevant Panchang moment for the observanceWhy this date?
Occurs monthly when the Moon reaches the 30th tithi (new moon), calculated as the moment when Sun and Moon have the same longitude. This is the darkest night of the lunar month.
Read the calculation methodologyAmavasya tithi and Panchang details
Calculation type
tithiFestival type
fastingCommon observance
fastingSignificance
Considered powerful for Pitru Tarpan (ancestor worship).
Traditions and Regions
Traditions
Observed in
Common questions
How is Amavasya dated?
Amavasya is a recurring Hindu observance calculated from its Panchang rule. Samvat explains the tithi, significance, and date logic.
What is the tithi for Amavasya?
The Hindu date shown by Samvat is Amavasya. This is based on the festival rule encoded for Amavasya.
Can the date differ by city?
Yes. Panchang values depend on sunrise, sunset, moonrise, and timezone. Samvat's public festival page uses an India-baseline calculation; local observance can differ by city, sampradaya, or family tradition.