depicting the calendar of saints (18th-19th century).
The following list of dates links only to fixed feasts of the Orthodox Church. These are the fixed dates; the particular day on which that date is observed differs depending upon whether one follows the Julian Calendar (sometimes referred to as the "Old Calendar") or the Revised Julian Calendar ("New Calendar"). All dates having to do with Pascha (Easter) - the beginning of Great Lent, Ascension, Pentecost, etc. - are "moveable" feasts, and thus are not on this calendar (see Paschal cycle).
These important notes should be remembered in using the following calendar:
- For the day in the modern Gregorian Calendar. on which churches following the Julian Calendar celebrate any fixed date's commemoration, the 13 days which were lapsed to correct the calendar to the seasons must again lapse, by adding the 13 days to the dates below. For example, Christmas Day (December 25) on the Julian Calendar falls on January 7 of the modern Gregorian Calendar.
The number of days by which the Gregorian calendar differs from the Julian calendar is currently 13, but will increase to 14 on March 1, 2100. Over the course of future centuries, the difference will continue to increase, limitlessly.
- For those churches which follow the Revised Julian Calendar the dates below correspond exactly to the dates on the Gregorian Calendar.
The Orthodox liturgical year begins on September 1.