Miron’s name day is August 17, the feast of Myron of Cyzicus.
Churches that follow the Old (Julian) Calendar keep the same feast on August 30 of the civil calendar. See everything commemorated on August 17.
The saint behind the name
Myron of Cyzicus
August 17, Hierarch, Μύρων
St. Myron was a presbyter of Cyzicus in Asia Minor who lived in the middle of the third century. Tradition relates that when the governor Antipater burst into the church during the Nativity service, Myron rebuked him openly and was seized, tortured, and cast to wild beasts, which left him unharmed.
Also celebrating on August 17
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.