Menaion

Semi-Autonomous: The Menaion (Greek: Μηναῖον; Slavonic: Минїѧ,[1] Miniya, "of the month") is the liturgical book used by the Eastern Orthodox Church[note 1] containing the propers for fixed dates of the calendar year, i.e. entities not dependent on the date of Easter.

The Menaion is the largest volume of the propers for the Byzantine Rite and is used at nearly all the daily services.

The General Menaion contains services for each type of celebration (apostles, martyrs, etc.)

[note 2] As of the 21st century there is a thirteen-day difference between the two calendars, so where the former is used, any given fixed date occurs thirteen days later than where the latter is used, e.g., Christmas is fixed on December 25, but where the Julian calendar is used, that date falls on what is commonly known as January 7.

The term "Menaion" is also applied to icons of all the saints whose feast days fall within a particular month.