In Eastern Christianity, Thaddeus the Apostle of the 70, also known as Thaddeus of Edessa, was born in the Syrian city of Edessa.
This Thaddeus is referred to as "Thaddeus of the 70" to distinguish him from Saint Jude, also called Thaddeus or Levi, who was one of the Twelve Apostles.
Thaddeus was chosen by Jesus to be one of the Seventy Disciples, whom he sent by twos to preach in the cities and places where he intended to visit.
Here are some ways you can observe this day according to Eastern Christian tradition: