Dorothy’s name day is February 6, the feast of Dorothea of Caesarea.
Churches that follow the Old (Julian) Calendar keep the same feast on February 19 of the civil calendar. See everything commemorated on February 6.
The saint behind the name
Dorothea of Caesarea
February 6, Holy Woman, Δωροθέα
St. Dorothea was a devout maiden of Caesarea in Cappadocia who was arrested during the persecution of Diocletian. Two sisters who had lapsed from the faith were sent to sway her, but she brought them back to Christ and they were martyred with her.
Also celebrating on February 6
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.