Benedict’s name day is March 14, the feast of Benedict of Nursia.
Churches that follow the Old (Julian) Calendar keep the same feast on March 27 of the civil calendar. See everything commemorated on March 14.
The saint behind the name

Benedict of Nursia
March 14, Venerable, Βενέδικτος
St. Benedict was born in Nursia in Italy in the late fifth century. Leaving his studies in Rome to flee the corruption of the world, he lived first as a hermit in a cave at Subiaco, and later founded the great monastery of Monte Cassino. His Rule for monks, marked by prayer, labor, moderation, and obedience, shaped the whole monastic life of the Christian West.
Name days: Venediktos, Benedict
Also celebrating on March 14
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.