Kallistheni’s name day is October 4, the feast of Audaktos and Kallisthene.
Churches that follow the Old (Julian) Calendar keep the same feast on October 17 of the civil calendar. See everything commemorated on October 4.
The saint behind the name
Audaktos and Kallisthene
October 4, Holy Woman, Αύδακτος και Καλλισθένη
Audaktos was a nobleman of Ephesus whose daughter Kallisthene was sought in marriage by the emperor Maximian Galerius. Because she refused for Christ's sake, her father was stripped of his rank and possessions, exiled, and finally beheaded.
Name days: Kallistheni, Callisthene
Also celebrating on October 4
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.