Festival guide
Onam
ओणम
Kerala's harvest festival welcoming King Mahabali.
At a glance
How is Onam dated?
Onam is an annual Hindu observance whose Gregorian date can change each year. Samvat calculates each year's date from its nakshatra Panchang rule; choose a year for the exact date and tithi.
Also known as: Thiruvonam, Thiru Onam.
Yearly reference
Onam dates by year
Choose a year for the exact Gregorian date, Hindu date, observance rule, and related calendar links.
Regional names and traditions
Onam, Thiruvonam, and Malayalam calendar context
Onam is associated with the Thiruvonam nakshatra and Kerala calendar. Samvat calculates it with a Kerala baseline, but temple and family observance details can still vary locally.
Why this date?
Falls when Thiruvonam (Shravana) nakshatra prevails during Chingam, the Malayalam solar month when the Sun is in Simha. Samvat calculates this for a Kerala baseline using the Thiruvananthapuram sunrise.
Learn how Hindu calendar dates are calculatedOnam tithi and Panchang details
Date determined by
Nakshatra in the solar monthCategory
Regional festivalNakshatra
ShravanaDietary practice
No specific restrictionSignificance
Celebrates the annual return of the mythical King Mahabali.
Traditions and Regions
Traditions
Observed in
Common questions
How is Onam dated?
Onam is an annual Hindu observance whose Gregorian date can change each year. Samvat calculates each year's date from its nakshatra Panchang rule; choose a year for the exact date and tithi.
What is the tithi for Onam?
The Hindu date is calculated separately each year from the tithi, paksha, and Hindu month for Onam. Choose a year above to see the details.
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.