Irenaios’s name day is May 5, the feast of Irenaeus, Irene and Peregrinus of Thessalonica.
Churches that follow the Old (Julian) Calendar keep the same feast on May 18 of the civil calendar. See everything commemorated on May 5.
The saint behind the name
Irenaeus, Irene and Peregrinus of Thessalonica
May 5, Martyr, Ειρηναίος, Ειρήνη και Περεγρίνος
Irenaeus, Irene and Peregrinus were Christians of Thessalonica who were put to death for their faith, according to the synaxarion by fire. They are honored together on the same day as the Great Martyr Irene.
Also celebrating on May 5
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.