Onam Date In 2025 April. Onam is celebrated on dwadashi tithi of shukla paksha in the month of bhadrapada and under shravana nakshatra. Onam 2025 is on september 15, sunday.
Thiruvonam falls on sunday, september 15, 2025. Onam, a major festival in kerala, marks the end of the monsoon and the start of the harvest season.
