My Pastor delegates preaching to me on Sundays. As I researched potential sermon topics, I read up on details of this Feast. Even though I have been Orthodox for thirteen years, I never knew about a Tradition wherein John the Evangelist was assumed bodily into Heaven at his death.
In Tractate 124 of his Commentary on the Gospel of John, St. Augustine knows nothing of a tradition about such an assumption.
Even so, I find the tradition a fitting possibility. Here I preach on the matter.