The calendar includes the full calendar of feast and saints. It does not require Internet connection, so it will display the feast, or the saint of the day, even if you are on Sinai or Mount Athos :-)
The application is solely in French and can display both the old (Julian) and the new (Gregorian) calendar (there is a setting for the Calendar style).
Fasting rules are also displayed, but you are kindly asked not too rely too much on them, they are accurate, but you should consult your priest for the details.
The application enables browsing the calendar and jumping to a specified date, both in the past and in the future.
Uniquely, the application enables jumping to a certain date related to the Paschal cycle of the year, both in the past and in the future!
A link to an on-line calendar with the lives of the saints is also included.
Support forum - http://eir3.com/forum/viewforum.php?f=5
* The application was made free through the generosity of the pious Orthodox Christians, mention in your prayers: Vladimir, Vladimir, Tatiana, Viachelsav and the reposed Ivan.