Onam 2025 Date In India Calendar. Date, time, rituals, history, and significance of kerala’s biggest festival onam, the 10 days of festive joy in kerala, will be celebrated from. Onam 2025 is on september 15, sunday.
Onam 2025 officially begins with atham on september 6 and culminates with thiruvonam on september 15. Begins at 08:32 pm on september 14 and ends at 06:49 pm on september 15.