Patroklos’s name day is January 21, the feast of Patroklos the Martyr.
Churches that follow the Old (Julian) Calendar keep the same feast on February 3 of the civil calendar. See everything commemorated on January 21.
The saint behind the name
Patroklos the Martyr
January 21, Martyr, Πάτροκλος
St. Patroklos was a wealthy Christian of Troyes in Gaul who devoted his goods to the poor. In the persecution of the third century he confessed Christ before the governor and was beheaded.
Also celebrating on January 21
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.