Aidan’s name day is August 31, the feast of Aidan of Lindisfarne.
Churches that follow the Old (Julian) Calendar keep the same feast on September 13 of the civil calendar. See everything commemorated on August 31.
The saint behind the name
Aidan of Lindisfarne
August 31, Hierarch, Αϊδάνος
St. Aidan was an Irish monk of the monastery of Iona who in the seventh century was sent at the request of King Oswald to evangelize the kingdom of Northumbria in northern England. Consecrated bishop, he made his seat on the island of Lindisfarne, from which he traveled on foot through the countryside, preaching Christ with gentleness, ransoming captives, and giving to the poor whatever he received.
Name days: Aidan
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.