The annual feast of saint Thomas began on June 30 and will be a four-day celebration at St Thomas Cathedral in San Thome.
The flag hoisting event and Mass was held on day one, in the evening.
On Saturday, archbishop Rev. George Antonysamy will celebrate Mass after the colourful car procession that will be taken out in the Cathedral zone at 6.15 p.m.
The feast will be celebrated at Masses on Sunday, said Fr. Arulraj, parish priest.