Hermes’s name day is March 8, the feast of Hermes the Apostle.
Churches that follow the Old (Julian) Calendar keep the same feast on March 21 of the civil calendar. See everything commemorated on March 8.
The saint behind the name
Hermes the Apostle
March 8, Apostle, Ερμής
St. Hermes was one of the Seventy Apostles, greeted by St. Paul in his Epistle to the Romans. Tradition relates that he became Bishop of Dalmatia and labored there in preaching the Gospel.
Also celebrating on March 8
These names share the feast, many of them other forms of the same name:
What to say on a name day
The Greek wish is Χρόνια Πολλά (Chronia Polla), “many years.” A call or a short message on the day is what people remember. See name day wishes you can send and what a name day is.