Olympiada’s name day is July 25, the feast of Olympias the Deaconess.
Churches that follow the Old (Julian) Calendar keep the same feast on August 7 of the civil calendar. See everything commemorated on July 25.
The saint behind the name
Olympias the Deaconess
July 25, Holy Woman, Ολυμπιάς η Διακόνισσα
St. Olympias was a noblewoman of Constantinople who, widowed young, devoted her great wealth to the Church and the poor and was ordained a deaconess. She was a close friend and supporter of St. John Chrysostom, and shared his sufferings when he was exiled.
Name days: Olympia, Olympias, Olympiada, Olymbia, Olimpia, Olympie
Also celebrating on July 25
These names share the feast, many of them other forms of the same name:
Olympia, Olympias, Olymbia, Olimpia, Olympie
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.