Eortologio Εορτολόγιο κ αργίες is a free Android application developed by educ8s.com. It falls under the category of Social & Communication, and it is the smallest and fastest Greek calendar app in the market. Despite its small size, it is complete and contains all the fixed and movable holidays with many features. It is optimized with modern software development techniques and supports over 9,000 different devices.

The app has several features such as displaying fixed and movable holidays throughout the year, calculating holidays until 2050, calculating three-day weekends for each year, and calculating how many holidays "fall" on weekends each year. It does not require an internet connection to display holidays and allows searching for holidays by date, name, or Greeklish. It also notifies users if any of their contacts are celebrating a holiday, has a widget, and works on all Android mobiles and tablet pcs. It supports older devices with Android v2.0+, and it is only 0.33Mb in size. The app is free and receives continuous updates.