During the 11th century, a debate raged in Christian churches over which of the three hierarchs was indeed the greatest. Some people believed it was Saint Basil, while others were firmly in the corner of John Chrysostom. Each of these saints had their own feast day in January—with St. Basil having his on January 1st, Saint Gregory on January 25th, and John Chrysostom on January 27th. The Eastern Churches declared that each was equal before God. That’s when all three feast days were combined and celebrated on January 30th.