Today for us in the New Calendar we celebrate Theophany, when Christ was baptized in the Jordan. Christ crushed the head of the dragon in the water, made possible our regeneration, and in Him the Trinity was revealed.
Tomorrow those in the Old Calendar celebrate Christ’s Nativity.
One year while we were traveling after N.C. Christmas, we visited some Old Calendar parishes and a monastery and got on their schedule till right before their celebration of Theophany. It felt right. I don’t think New Calendar commemorations are invalid, but it feels like they are sealed 13 days later when we are joined by our Old Calendar bretheren here, and all the Orthodox in Russia. Kind of like how Chrismation seals a person entering the Orthodox Church after they have been baptized elsewhere.
I like how attentive the angels are in both icons.