A program for calculating the date of Easter according to the new and old styles, as well as some other passing Orthodox holidays, reckoned before and after the date of Easter.
The calculation is based on the algorithm of Carl Friedrich Gauss on the lunar-solar calendar.

The application now also includes:
• Orthodox calendar with a brief list of events, holidays, veneration of saints for each month of the new and old styles;
• Clear descriptions for each of the days of Holy Week.

The app is free, fully offline, internet connection at work is not required.