02 — The Cycles

Orthodox liturgical time runs on four cycles at once: the day, the week, the fixed year of the Menaion, and the movable year of the Triodion and Pentecostarion. This section sets out how each works and — crucially for everything that follows — which of them are counted and which are dated. Only the dated cycles are touched by the calendar question at all.

Tradition: Pan-Orthodox

Contents

File Description
the-daily-and-weekly-cycles.md The eight services and the hours’ commemorations; the cathedral/monastic synthesis after Taft; Sunday and the canonical prohibition of Sunday fasting; the eight tones and the themes of the weekdays; Wednesday and Friday from Didache 8.1 — and why none of this is affected by any calendar
the-fixed-and-the-movable-year.md The Menaion against the Triodion and Pentecostarion; the September Indiction; the Markan chapters and the concurrence of feasts; the four fasts classified by how they are anchored — and the Apostles’ Fast as the one structure spanning both cycles

The Load-Bearing Point

Two of the four cycles are counted: the day and the week run by sequence, not by date, and every calendar reform in history has renumbered days without reordering them. Sunday, the tone of the week, and the Wednesday and Friday fast are identical for every Orthodox Christian on earth.

Two are dated: the fixed cycle is read off a solar date grid, and the movable cycle is computed by the Paschalion and then expressed on whatever grid the local church uses. These are different reckonings, and they can be changed independently — which is the fact the whole calendar question turns on.

And one structure spans both: the Apostles’ Fast, with a movable start and a fixed end. Section 05 shows what happens to it when the two reckonings are separated.

Reading Order

the-daily-and-weekly-cycles.md for what the dispute does not touch, then the-fixed-and-the-movable-year.md for what it does.

See Also