Onam is a harvest festival celebrated in state of Kerala, India. According to the Malayalam calendar, the festival falls on the 22nd Nakshatra Thiruvonam in the month Chingam, which generally falls in August to September in the Gregorian calendar.

Onam marks the beginning of the Malayalam year, and it is a 10-day festival. Onam starts from Atham, the first day of Onam and ends on Thiruvonam, which is also the most important day of Onam celebrations.

The days of the festival celebrations are: Atham, Chithira, Chodi, Vishakam, Anizham, Thriketa, Moolam, Pooradam, Uthradom (or First Onam) and Thiruvonam.

The following is the list of Atham / Onam from 2021 to 2025.

Atham / OnamAug 12, 2021Thursday
Atham / OnamAug 30, 2022Tuesday
Atham / OnamAug 20, 2023Sunday
Atham / OnamSept 06, 2024Friday
Atham / OnamAug 27, 2025Wednesday

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