Malayattoor has a pilgrimage festival. Devotees climb the hill without any celebration, after leading an austere life of prayer. The Feast day falls on the Sunday after the resurrection of Christ (Easter). Since His disciples did not see him after resurrection, St. Thomas did not believe it. But the Lord appeared on the eighth day, blessed St.Thomas and cleared his doubts. This day is known as New Sunday. Devotees ascend the hills with chanting.
Another Feast being observed by the Christians in Kerala is Dukram. This Feast, observed on July 3, is a reminder of the martyrdom of St. Thomas. Devotees go to Mylapore for Dukram Feast. December 18 is observed as Kurissu Viyartha Feast of St. Thomas. This is observed in connection with the stone cross of Mylapore. The diocese church stands on the banks of river Periyar. This is also known as Thazhathu. Ascending of the hills begin from the valley. A statue of St. Thomas is there at the place where the pilgrimage begins.
The Kurisu Mudi is a hillock of eight rocks and atop it, there is the Aana Kuthiya Pally and accommodation facility for pilgrims. The rock that bears the golden cross and the one which has the footfall of St. Thomas are conserved as the proof of his visit. Pilgrims come from Tamil Nadu also. Holy rituals are performed every day at this centre, which has gained international reputation.