Saint Thomas (1st century AD) Feast Day 21st December

Saint Thomas, the twin, was one of Jesus’ 12 original disciples/apostles.

Saint Thomas is mentioned three times by name in St. John’s Gospel.
He speaks after the resurrection of Lazarus when Jesus talks about going to Jerusalem. Let us also go, that we may die with him John 11 v16

After Jesus has spoken about preparing a place in heaven he says
Lord, we know not whither thou goest;and how can we know the way?

The third time, the most best known time is after Jesus’ resurrection. This is where he is referred to as ‘doubting’ Thomas. He makes a comment that he will not believe Jesus is alive unless he puts his hands physically into the injured holes in the hands,feet and side of his Lord. Jesus appears and invites Thomas to touch him. My Lord and my God . (He is the first to acknowledge his divinity.)
Jesus goes on to say, Thomas, because thou hast seen me, thou hast believed; blessed are they that have not seen, and yet believed.

Saint Thomas was presumably at both the Ascension and Pentecost.

Thomas’ subsequent history is uncertain. Tradition holds that he took Christianity to Parthia.
The existence of an ancient Christian community on the Malabar Coast of India suggests that he converted their ancestors but was martyred and buried at Mylapore (now part of Madras)
Another story suggests he converted ruler in the Punjab and was by killed in accident by an archer shooting at peacocks.

Sources used
The Church’s Year Charles Alexander
wikipedia
Britannica Online Encyclopedia
The Encyclopedia of Saints by Howard Loxton