The Ḥudra
650 · Church of the East · original-public-domain
14 claims in this dataset rest on this source.
What else rests on it
9 liturgical seasons · 4 feast observances · 1 rite
The great East Syriac cycle-book. Rabban Brick-Iso's fourteenth-century preface sets out the nine seasons of about seven weeks each by which the Church of the East counts its year — the reason a day in that rite is named as the Nth Sunday of its season rather than by a date at all.