Onam 2025 Dates. The hindu festival onam is observed during the month of chingam on the malayalam calendar, which is typically between august and september. Thiruvonam falls on friday, 5 september 2025.
We’ve included a comprehensive list of hindu holidays and fasts below. Onam 2025 is on friday 5th sep, 2025 (05/09/2025) in 252 days.