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Karthikai day in the month Vrishchikam (November–December), is considered a special day and is celebrated in a grand manner at the temple. The deity is considered more powerful on Tuesdays, Fridays and Sundays. Annadaana (food offering) is made daily at the temple. Plastic bags are not allowed inside the temple. The coconuts are to be "offered" by carrying them on a non-plastic bags.
There is another temple, Madambiyar Kavu Temple, situated a short distance away from the Kadampuzha Devi Temple, which was originally constructed and maintained by the "Thekkencheri" Nair family. The idol of the Madambiyar Kavu Temple is god Siva in his "Kirata" incarnation.
There are two main daily rituals at the Kadampuzha Devi Temple.
The Muttarukkal offering is being done only in the morning i.e. between 0500 and 0700 on weekdays. On Sundays the timings for the Muttarukkal offering is also allowed between 1500-1745 in addition to the morning time. The counter timings in the evenings are between 1530-1700 on Sundays.
A demon named Mukasura took the form of a wild boar and started destroying the trees and shrubs around Arjuna. Arjuna was in deep meditation at the time, in order to get the Pasupathasthra (a divine arrow named "Pasupatham") from Lord Paramasiva.
Both Arjuna and Shiva shot at the wild boar and both claimed that his arrow had killed the animal. They argued, and finally agreed to fight a battle with bow and arrow. The victor of the battle would also get the honour of being the killer of the wild boar. The ensuing battle was fierce and Arjuna was defeated. Despondent over the defeat, Arjuna placed a big stone in front of him and started praying to the mother of the universe Parasakthi while showering flowers over the stone. He was amazed to see that the flowers fell at the feet of the Kirata and Kirati. He realised that those people were actually Lord Paramasiva and Devi Parvathy. The Lord and Devi Parvathy were pleased with Arjuna and gifted him with the Pasupathastra arrow.
Another legend says that Adi Sankaracharya, during his travels, once happened to pass through Kadampuzha, which was then a grassland. At one place he could not pass further, as he seemed to strike an invisible wall. He understood it to be the meeting point of the Goddess Parasakthi in her Devi Parvathy incarnation and Lord Parameswara in his "Kirata" incarnation. Adi Sankaracharya prayed to the Devi and she appeared before him. After blessing him, the goddess disappeared into a small hole in the ground. He did the first poojas to the devi there on that day in Vrishchikam (November–December) and the sanctum of the temple is said to have been built around that hole.