The Youth Apostolate -YUVADEEPTHI- of the Archdiocese of Changanacherry was established on 3rd December 1972. The founder of this Organization is His Grace Mar Joseph Powathil and the movement was inaugurated by Mar. Antony Padiyara at Kallarackal Hal I, S. B.College Changanacherry. The main aim of the movement is to enlighten the world in Christ, - The Light of The World. Its motto is: Change the world through your parish. The means to achieve this goal are prayer, study, formation, action and reformation.

Yuvadeepti is a part of KCYM - Kerala Catholic Youth Movement, which is affliated to ICYM - Indian Catholic Youth Movement. As the name suggests Yuvadeepti is national wide catholic youth' organisation which is aiming at theintegral development of every youth. The word "Yuvadeepti" is joined by two words "Yuva" & "Deepthi". "Yuva" means youth and "Deepthi" means light.. yes we are to give the light of Jesus to our youth!

St.Sebastians Church Chanjody has an active Yuvadeepthi unit under the leadership of Vicar Rev.Fr. Antony Kizhakkeveettil.

The executive representation of the unit are as follows :

Director : Fr. Antony Kizhakkeveettil

Animator :

President : Johnson Joseph Kalathil, Sneha Joseph Chettakadu

Vice President : Nithin Thomas, Tressa Lalichan

Secretary : Akash Abraham, Christeena Mary John

Joint Secretary : Juhal Varghese, Sneha Kurian

Treasurer :Bijo Thomas

Councillor : Jayan Jacob, Athira Benny

Executive Members : Litto Thomas, Jaisy Joseph, Jenu Maria George