Navarathri
The Navarathri which falls on the suklapaksha pradhama to Navami days in the Malayalam Kanni month and the Vijayadasami on the tenth day are celebrated in this temple in a very grand manner. In olden days Mammiyur was a centre of Arts and Painting and also the Kalari of Kerala style of martial arts maintained by the chieftans of Eralpad Raja. A Mammiyur style was also derived in the field of Mural paintings. The Sarawathy Mandapam which situates on the northern side of the Temple was the Kalari for Cholliyattam to the Krishnanattam artists of Guruvayoor Devaswom. Since Goddess Saraswathy is the presiding deity in the world of learning and fine arts, this Saraswathy Mandapam where Goddess Saraswathy is installed has been a venue for the celebration of Navarathri in temple. This mandapam and temple will be specially decorated for Navarathri poojas. The books from the houses of the locality will be placed in poojas on Durgashtami day. There will be Veda sara lalitha sahasranama laksharchana on the auspices of the thanthri of the temple on Navami day. Customarily the children are initiated into learning on Vijayadasami day which is known as Vidyarambham. On Vijayadasami day hundreds of children are taken to Vidyarambham at this Saraswathy Mandapam. During Navarathri days special poojas with Vada nivedyam etc are offered to Lord Hanuman, the sankalpa installation at this Saraswathy Mandapam.
As a part of Navarathri poojas on Navami day there is bimbasudhi, kalasam, big bhagavathy seva, thrikalapooja, Niramala, chuttuvilakku and special poojas to Bhagavathy enshrined in a Sree Kovil at the North west side of the Temple.
The added attraction of the Navarathri festival is the sangeetholsavam and the musical and cultural performance in the open air stage in front of the temple. This Sangeetholsavam is attaining importance to that of the music festival being arranged in connection with the Guruvayoor Temple Festival. The nine days long Sangeetholsavam will be concluded with Pancharatna Keerthanalapanam on Navami day.

Manadala Pooja
The Mandala Pooja begins on the first day of the malayalam month Vrishchikam. This is a period of 41 days for the first phase of pilgrimage to the shrine of Lord Ayyappa at Sabarimala. Most of the devotees who go to Sabarimala also visit Guruvayoor and Mammiyur Temple.
The Mandala pooja season is celebrated in Mammiyur Temple with daily Niramala, Chuttuvilakku, special poojas etc. to Lord Ayyappa. There will be bimbasudhi, Kalasam, Navakom, Panchagavyam, Trikala Pooja and special poojas to Lord Ayyapa on the first day of Dhanu Malayalam Month. At the end of the Month of Vrishchikam there will be a grand Ayyappan Vilakku and Annadanam conducted in the temple compound on the auspices of Mammiyur Ayyappa Bhaktha Sangham.

Vinayaka Chathurthy
Vinayaka Chathurthy on Suklapaksha Chathurthi day in the month of Chingam Malayalam month is celebrated with Bimbasudhi, Kalasam to Lord Ganapathy, Navaka Abhishekam, Panchagavya Abhishekam, Thrikala pooja, Big Koottu Ganapathy Homam and Ottappam Nivedyams.

Ramayana Month
The Karkitaka Month is celebrated as the Ramayana Month with Ramayana parayana, Bhaghavathy seva, Trikala Pooja, Niramala, Chuttuvilakku, Koottu Ganapathy Homa, etc daily. There will be Bimbasudhi, Kalababhishekam to Bhaghavathy and the celebrations will be concluded on the 31st day with a Prathyaksha Maha Ganapathy Homa using 1008 Appams, 1008 Adas, Ghee, Paddy Grains, Sugarcane, Ganapathy Orange, Avil, Malar, Honey and such other dravyas in the specially built large Homakunda infront of the Temple in the presence of an elephant in the sankalpa of Lord Mahaganapathy.

Shashti
The Pooyam star day in the month of thulam is celebrated as the pradishta day of Lord Subrahmanian with Bimbasudhi, Kalasam, Navakam, Panchagavya abhishekam, Milk abhishekam, Rosewater, Tender coconut and padma abhisekham, Trikala pooja, Panchamrutham nivedyam and panaka pooja and other special poojas.

Ayilya Pooja
The ayilyam star day in the month of Kanni is celebrated with special Nagapooja, Ayilya Pooja, Noorum palum offering and also Sarpabali at the Naga Shrine in Temple.

Thiruvathira
The thiruvathira star day in the Malayalam month of Dhanu is celebrated , as Thiruvathira festival in this Temple with Rudhrabhisheka and 1008 tender cocunut abhisheka to Lord Mahadeva followed with Niramala, Chuttuvilakku, Keli, Nadaswara amd chendamela and special poojas.

Nira Putheri
Illam nira is a traditional festival in temples and houses in Kerala in the month of Chingam marking the new harvest season. The concept is to ceremonially take home the bunches of paddy plants having ripened grains as a symbol of prosperity. The paddy plants thus dedicated to the God will be distributed as prasadams to the devotees which will be kept in homes as a symbol of filling the granaries. Puthari means new rice. It is a formal beginning of the use of rice from the new harvest season for offering in temple. Puthari payasam made out of the new rice is offered to Lord and distributed as prasadams to devotees.

Ashtami Rohini
The Rohini star day in the month of Chingam is the birthday of Lord Krishna which is celebrated in this Temple with Niramala, Chuttuvilakkau and special poojas to Lord Vishnu. The festival will be followed with a colorful procession from Mammiyur Temple to Guruvayoor Temple.

Vishu
The first day of Medam month is the new year day of Malayalees. People believe that the fortunes for the next year depend upon the nature of objects one sees in the morning of Vishu. For this purpose, a Kani (an omen) with articles like karnikara flowers, rice, betal leaves, aricanut, gold coins and ornaments are displayed in front of the diety as a beautiful darshan.

Pradosham
The pradosha vratha by the devotees is observed in the evening on the thrayodasi day in the both Suklapaksha and Krishnapaksha in a month. It is believed that Lord Shiva used to play his typical prodosha dance in the presence of Sree Parvathy and all Gods and goddesses will be assembled there to enjoy the dance performance. It is also believed that the Prodosha Vratha will remove all stakes, difficulties and mental turmoil and will bring solace and blessings in one’s life. The pradosham is celebrated in this temple with 108 kudam Jala Dhara and Special Poojas attended by large number of Devotees.

Annadanam
As annadanam is one of the five great yagnas in human life the Devaswom is providing free noon meals as prasadaoottu to all devotees who visit this temple.