April 5 - April 7
Uthram Mahotsavam is the celebration of the birth of Lord Ayyappa. Every year, the temple festival is celebrated based on “Uthram”, the birth star of Lord Ayyappa.
Hindu scriptures say that Poornima (full moon) and the Uthram star coinciding in the month of Paiguni (Meena masam) is highly auspicious. The birth of Lord Ayyappa took place on this day. Early morning after Nirmalya darshanam, Ashta Dravya Ganapathy Homam is performed followed by special puja, Navakam, Panchagavyam, Kalasa Puja etc which are performed by Temple Thanthri. Annadanam (Prasada Oottu) is offered during lunch and dinner to all who attend the Puja.
A Thalappoli procession will be organised from nearby Vezhathumyal Bhagavati Temple to Chinmaya Swayambhu Ayyappa temple. Chuttuvilakku is a special attraction on that day. The 1008 oil lamps are lit all around the main temple by devotees. Various offerings can be made at the temple during this day like Ganapathy Homam, Para Nirakkal etc. In Kerala, paddy represents Goddess Lakshmi and during temple annual festival, the devotees offer Paddy to Bhagavan which is very auspicious. Every year, well-known artists in the field of temple rituals (Kathakali etc.) are invited and provide an opportunity to perform.