Εορτολόγιο is a free Android app developed by George Grafiadellis, falling under the Lifestyle category. It is a Greek calendar that provides daily updates on holidays and important days of the year. The app also features a list of all major holidays and the ability to search for specific dates or names.

One of the standout features of Εορτολόγιο is its immediate notification system for contacts celebrating the current day, allowing users to send greetings via SMS, Facebook, or even outgoing calls through the contact card. The app also offers four different graphics backgrounds to choose from, as well as two widgets for the home screen.

Overall, Εορτολόγιο is a useful app for anyone looking to stay up-to-date on Greek holidays and celebrations, as well as easily send greetings to their contacts on special days.