Onam 2025 Date Malayalam Calendar. In 2025, onam festivities will begin on september 6 and run until september 17, with the grand. Kanni 1, 2025 falls on september 17.
On the auspicious day of thiruvonam, which falls on 15th september in the year 2025, the vibrant and joyous festival of onam reaches its pinnacle. Onam day is decided based on solar calendar.