Log the Sunday/seasonal Matins hymn work in TODO.md

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AGjUyhUZJaSjiniEmnLdak

TODO.md

@@ -5422,3 +5422,42 @@ one (Ember/Advent/Lent) where nothing wins outright and Marian Saturday's own `o
 doesn't apply. Authored `matins-hymn-ferial-saturday.yml` ("Summæ Deus cleméntiæ", live-verified
 against a clean September Ember Saturday, 2025-09-20) and added it to `resolveMatinsHymn`'s weekday
 lookup. `npm test` (2025 passed, no test changes needed) and `tsc --noEmit` both pass.
+
+### Sunday's own Matins hymn, plus every season's (Advent/Septuagesima/Lent/Passiontide/Paschaltide) (2026-09-04)
+
+User asked for the actual detail behind the "genuinely more complex, not-yet-understood two-hymn
+mechanism" flagged in the entry above (`Day0 Hymnus` vs `Day0 Hymnus1`). Turned out not to be a
+mystery: live-checking several clean dates showed `Day0 Hymnus` ("Nocte surgéntes vigilémus omnes")
+is simply Sunday's own plain per-annum hymn, and `Day0 Hymnus1` ("Primo diérum ómnium") is
+Septuagesima-tide's own separate seasonal hymn — the exact same shape as Advent/Lent/Passiontide/
+Paschaltide each having their own (live-verified: a Lenten Sunday and a Lenten feria both render
+"Ex more docti mýstico" identically, so these seasonal hymns don't vary by weekday the way the
+plain per-annum cycle does). None of the 5 seasonal Matins hymns, nor Sunday's own plain one, were
+authored at all before this — every Sunday and every Advent/Lent/Passiontide/Paschaltide/
+Septuagesima day (Sundays and ferias alike) that wasn't otherwise overridden by a winning saint/
+octave was silently falling through to Monday's own ferial placeholder text.
+
+Authored `matins-hymn-sunday.yml` ("Nocte surgéntes"), `matins-hymn-advent.yml` ("Verbum supérnum,
+pródiens"), `matins-hymn-lent.yml` ("Ex more docti mýstico"), `matins-hymn-passiontide.yml` ("Pange,
+lingua, gloriósi prœlium certáminis" — this breviary's own 5-stanza recension, not the longer
+"Lustra sex..." continuation some other uses of the hymn carry), `matins-hymn-paschaltide.yml`
+("Rex sempitérne Dómine"), and `matins-hymn-septuagesima.yml` ("Primo diérum ómnium") — all
+live-verified, all self-contained with their own real closing doxology baked in (each one fixed and
+distinct, not the shared weekday "Praesta, Pater piíssime..." ending).
+
+Septuagesima is checked directly by `day.season === 'septuagesima'` in `resolveMatinsHymn` itself,
+deliberately *not* folded into the shared `seasonalOfficeSuffix` (Lauds/Vespers' own) — that
+function has no matching Septuagesima content authored for those hours yet, and `resolveOfficeBundle`
+there is all-or-nothing per feast, so adding it would silently blank their chapter/hymn instead of
+falling through to their current (imperfect but real) weekday default. Scoped to Matins alone; Lauds/
+Vespers' own Septuagesima gap is real and separately flagged here, not fixed.
+
+Also flagged, not fixed: the generic `matins-hymn-paschaltide.yml` will incorrectly render during
+the Ascension octave specifically, which is live-verified to have its own genuinely different proper
+hymn ("...Qui scandis super sídera") not yet authored anywhere — same-shape gap already existing in
+Lauds' own `lauds-hymn-paschaltide.yml`, not a new regression introduced here.
+
+Updated 2 `FERIAL_DATE` (2026-12-01, a Tuesday *in Advent*) hymn assertions in
+`tests/hours/matins.test.ts` that had been asserting Tuesday's own ferial text — Advent's own
+seasonal hymn correctly outranks the weekday cycle now. `npm test` (2025 passed) and `tsc --noEmit`
+both pass.

src/data/propers/common/matins-hymn-advent.yml

@@ -0,0 +1,100 @@
+# Advent's own Matins hymn ("Verbum supérnum, pródiens"). Live-verified
+# against both a plain Advent Sunday and a plain Advent feria
+# (2026-12-10, a Thursday with no saint of its own) — byte-identical, so
+# this season doesn't vary its Matins hymn by weekday the way the plain
+# per-annum ferial cycle does. Self-contained with its own closing
+# doxology stanza baked in (a fixed, unique ending, "Laus, honor, virtus,
+# glória... In sæculórum sǽcula" — not the shared weekday doxology).
+id: matins-hymn-advent
+text:
+  la: >-
+    Verbum supérnum, pródiens
+
+    A Patre olim éxiens,
+
+    Qui natus orbi súbvenis,
+
+    Cursu declívi témporis.
+
+
+    Illúmina nunc péctora,
+
+    Tuóque amóre cóncrema;
+
+    Audíto ut præcónio
+
+    Sint pulsa tandem lúbrica.
+
+
+    Judéxque cum post áderis
+
+    Rimári facta péctoris,
+
+    Reddens vicem pro ábditis,
+
+    Justísque regnum pro bonis.
+
+
+    Non demum arctémur malis
+
+    Pro qualitáte críminis;
+
+    Sed cum beátis cómpotes
+
+    Simus perénnes cælibes.
+
+
+    Laus, honor, virtus, glória,
+
+    Deo Patri, et Fílio,
+
+    Sancto simul Paráclito,
+
+    In sæculórum sǽcula. Amen.
+  en: >-
+    Celestial Word, to this our earth
+
+    Sent down from God's eternal clime,
+
+    To save mankind by mortal birth
+
+    Into a world of change and time;
+
+
+    Enlighten our hearts; vain hopes destroy;
+
+    And in thy love's consuming fire
+
+    Fill all the soul with heavenly joy,
+
+    And melt the dross of low desire.
+
+
+    So when the Judge of quick and dead
+
+    Shall bid his awful summons come,
+
+    To whelm the guilty soul with dread,
+
+    And call the blessed to their home.
+
+
+    Saved from the whirling, black abyss,
+
+    Forevermore to us be given
+
+    To share the feast of saintly bliss,
+
+    And see the face of God in heaven.
+
+
+    To God the Father and the Son
+
+    Our songs with one accord we raise;
+
+    And to the Holy Spirit, One
+
+    With them, be ever equal praise. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-hymn-ferial.yml

@@ -10,15 +10,13 @@
 # `resolveMatinsHymn` now looks up a weekday-specific id
 # (`matins-hymn-ferial-tuesday`/`-wednesday`/`-thursday`/`-friday`/
 # `-saturday`) for those five days; this file (`matins-hymn-ferial`, no
-# day suffix) is still used directly for Monday, and — as a deliberate,
+# day suffix) is still used directly for Monday. Sunday's own gap (turned
-# documented placeholder, not yet its own real content — for Sunday too:
+# out simple, not the "genuinely more complex two-hymn mechanism" first
-# Sunday's own real Matins hymn selection is a genuinely more complex,
+# suspected — see matins-hymn-sunday.yml's own header) and Saturday's own
-# not-yet-modeled two-hymn mechanism (Day0 Hymnus vs Hymnus1, live source
+# gap (superseded on nearly every ordinary Saturday by Marian Saturday,
-# tags H-MatDom1/H-MatDom4, purpose unconfirmed). Saturday's own gap
+# not a full Little Office — see matins-hymn-ferial-saturday.yml and
-# (superseded on nearly every ordinary Saturday by Marian Saturday, not a
+# calendar/index.ts's applyMarianSaturday) were both closed the same
-# full Little Office — see matins-hymn-ferial-saturday.yml and
+# session. See TODO.md's 2026-09-04 entries.
-# calendar/index.ts's applyMarianSaturday) was closed the same day. See
-# TODO.md's 2026-09-04 entries.
 #
 # The closing doxology stanza is split out into
 # matins-hymn-doxology-per-annum.yml (see hours/matins.ts) — the source

src/data/propers/common/matins-hymn-lent.yml

@@ -0,0 +1,173 @@
+# Lent's own Matins hymn ("Ex more docti mýstico"), used throughout Lent
+# up to (not including) Passiontide, which has its own separate hymn
+# (`matins-hymn-passiontide.yml`). Live-verified against both a plain
+# Lenten Sunday (2026-03-01) and a plain Lenten feria (2026-03-03, a
+# Tuesday) — byte-identical, so this season doesn't vary its Matins hymn
+# by weekday. Self-contained with its own closing doxology stanza baked
+# in (a fixed, unique ending, "Præsta, beáta Trínitas..." — not the
+# shared weekday doxology).
+id: matins-hymn-lent
+text:
+  la: >-
+    Ex more docti mýstico
+
+    Servémus hoc jejúnium,
+
+    Deno diérum círculo
+
+    Ducto quater notíssimo.
+
+
+    Lex et prophétæ prímitus
+
+    Hoc prætulérunt, póstmodum
+
+    Christus sacrávit, ómnium
+
+    Rex atque factor témporum.
+
+
+    Utámur ergo párcius
+
+    Verbis, cibis et pótibus,
+
+    Somno, jocis, et árctius
+
+    Perstémus in custódia.
+
+
+    Vitémus autem péssima,
+
+    Quæ súbruunt mentes vagas:
+
+    Nullúmque demus cállidi
+
+    Hostis locum tyránnidi.
+
+
+    Dicámus omnes cérnui:
+
+    Clamémus atque sínguli,
+
+    Plorémus ante Júdicem,
+
+    Flectámus iram víndicem,
+
+
+    Nostris malis offéndimus
+
+    Tuam, Deus, cleméntiam:
+
+    Effúnde nobis désuper,
+
+    Remíssor, indulgéntiam.
+
+
+    Meménto quod sumus tui,
+
+    Licet cadúci, plásmatis:
+
+    Ne des honórem nóminis
+
+    Tui, precámur, álteri.
+
+
+    Laxa malum, quod fécimus,
+
+    Auge bonum, quod póscimus:
+
+    Placére quo tandem tibi
+
+    Possímus hic, et pérpetim.
+
+
+    Præsta, beáta Trínitas,
+
+    Concéde, simplex Únitas,
+
+    Ut fructuósa sint tuis
+
+    Jejuniórum múnera. Amen.
+  en: >-
+    The fast, as taught by holy lore,
+
+    We keep in solemn course once more:
+
+    The fast to all men known, and bound
+
+    In forty days of yearly round.
+
+
+    The law and seers that were of old
+
+    In diverse ways this Lent foretold,
+
+    Which Christ, all seasons' King and Guide,
+
+    In after ages sanctified.
+
+
+    More sparing therefore let us make
+
+    The words we speak, the food we take,
+
+    Our sleep and mirth, and closer barred
+
+    Be every sense in holy guard.
+
+
+    Avoid the evil thoughts that roll
+
+    Like waters o'er the heedless soul;
+
+    Nor let the foe occasion find
+
+    Our souls in slavery to bind.
+
+
+    In prayer together let us fall,
+
+    And cry for mercy, one and all,
+
+    And weep before the Judge's feet,
+
+    And his avenging wrath entreat.
+
+
+    Thy grace have we offended sore,
+
+    By sins, O God, which we deplore;
+
+    But pour upon us from on high,
+
+    O pardoning One, thy clemency.
+
+
+    Remember thou, though frail we be,
+
+    That yet thine handiwork are we;
+
+    Nor let the honour of thy name
+
+    Be by another put to shame.
+
+
+    Forgive the sin that we have wrought;
+
+    Increase the good that we have sought:
+
+    That we at length, our wanderings o'er,
+
+    May please thee here and evermore.
+
+
+    Grant O thou Blessed Trinity,
+
+    Grant, O Essential Unity,
+
+    That this our fast of forty days
+
+    May work our profit and thy praise. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-hymn-paschaltide.yml

@@ -0,0 +1,185 @@
+# Paschaltide's own Matins hymn ("Rex sempitérne Dómine"), live-verified
+# against a plain post-Easter-Octave feria (2026-04-20, a Monday, "Feria
+# Secunda infra Hebdomadam II post Octavam Paschæ"). Covers vu's whole
+# `PASCHALTIDE_SEASONS` cluster (eastertide/ascensiontide/pentecost) per
+# `seasonalOfficeSuffix`'s existing collapse — but the Ascension octave
+# itself is live-verified to actually use a real, different, not-yet-
+# authored proper hymn of its own ("...Qui scandis super sídera",
+# 2026-05-15) that this app doesn't model yet; this generic Paschaltide
+# text will incorrectly apply there for now — a known simplification
+# matching a same-shape, pre-existing gap in Lauds' own
+# `lauds-hymn-paschaltide.yml`, not a new regression. Flagged in TODO.md.
+#
+# Self-contained with its own closing doxology stanza baked in ("Glória
+# tibi Dómine, Qui surrexísti a mórtuis..." — byte-identical to the
+# already-existing `hymn-doxology-pasch.yml` used by Lauds/Vespers, but
+# baked directly into the body here rather than split out/reattached,
+# since this hour doesn't need the seasonal doxology-override mechanism
+# for its own sub-season variants (Ascension/Pentecost/etc.) to matter —
+# those days don't reach this file's own generic content at all until the
+# proper-hymn gap above is closed).
+id: matins-hymn-paschaltide
+text:
+  la: >-
+    Rex sempitérne Dómine,
+
+    Rerum Creátor ómnium,
+
+    Qui eras ante sǽcula
+
+    Semper cum Patre Fílius:
+
+
+    Qui mundi in primórdio
+
+    Adam plásmasti hóminem:
+
+    Cui tuæ imágini
+
+    Vultum dedísti símilem.
+
+
+    Quem diábolus decéperat,
+
+    Hostis humáni géneris,
+
+    Cujus tu formam córporis
+
+    Assúmere dignátus es:
+
+
+    Ut hóminem redímeres,
+
+    Quem ante jam plasmáveras:
+
+    Et nos Deo conjúngeres,
+
+    Per carnis contubérnium.
+
+
+    Quem éditum ex Vírgine
+
+    Pavéscit omnis ánima:
+
+    Per quem et nos resúrgere
+
+    Devóta mente crédimus.
+
+
+    Qui nobis in Baptísmate
+
+    Donásti indulgéntiam,
+
+    Qui tenebámur vínculis
+
+    Ligáti consciéntiæ.
+
+
+    Qui Crucem propter hóminem
+
+    Suscípere dignátus es:
+
+    Dedísti tuum sánguinem
+
+    Nostræ salútis prétium.
+
+
+    Quǽsumus Auctor ómnium,
+
+    In hoc Pascháli gáudio,
+
+    Ab omni mortis ímpetu
+
+    Tuum defénde pópulum.
+
+
+    Glória tibi Dómine,
+
+    Qui surrexísti a mórtuis,
+
+    Cum Patre et Sancto Spíritu,
+
+    In sempitérna sǽcula. Amen.
+  en: >-
+    O thou, the heavens' eternal King,
+
+    Creator, unto thee we sing,
+
+    With God the Father ever One,
+
+    Co-equal, co-eternal Son.
+
+
+    Thy hand, when first the world began,
+
+    Made in thine own pure image man,
+
+    And linked to Adam, sprung from earth,
+
+    A living soul of heavenly birth.
+
+
+    And when by craft the envious foe
+
+    Had marred thy noblest work below,
+
+    Clothed in our flesh, thou didst restore
+
+    The image thou hadst made before.
+
+
+    So that thou might redeem man
+
+    Whom thou hadst made
+
+    And us to God might thou wouldst unite
+
+    Through thy union with the flesh.
+
+
+    Once wast thou born of Mary's womb;
+
+    And now, new-born from out the tomb,
+
+    O Christ, thou bidd'st us rise with thee
+
+    From death to immortality.
+
+
+    Eternal Shepherd, thou dost lave
+
+    Thy flock in pure baptismal wave,
+
+    That mystic bath, that grave of sin,
+
+    Where ransomed souls new life begin.
+
+
+    Redeemer, thou for us didst deign
+
+    To hang upon the Cross of pain,
+
+    And give for us the lavish price
+
+    Of thine own blood in sacrifice.
+
+
+    Grant, Lord, in thee each faithful mind
+
+    Unceasing paschal joy may find;
+
+    And from the death of sin set free
+
+    Souls newly born to life by thee.
+
+
+    To Thee Who, dead, again dost live,
+
+    All glory, Lord, Thy people give;
+
+    All glory, as is ever meet,
+
+    To Father and to Paraclete. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-hymn-passiontide.yml

@@ -0,0 +1,170 @@
+# Passiontide's own Matins hymn ("Pange, lingua, gloriósi prœ́lium
+# certáminis" — the Passiontide recension of Venantius Fortunatus' hymn,
+# distinct from Lent's own "Ex more docti mýstico" used up to this point).
+# Live-verified against both Passion Sunday itself (2026-03-22) and a
+# plain Passiontide feria (2026-03-24, a Tuesday) — byte-identical, so
+# this season doesn't vary its Matins hymn by weekday. This particular
+# breviary recension is 5 stanzas, ending after the Incarnation/manger
+# stanza — it does not continue into the "Lustra sex qui iam peracta..."
+# stanzas some other uses of this hymn carry. Self-contained with its own
+# closing doxology stanza baked in (a fixed, unique ending, "Glória, et
+# honor Deo..." — not the shared weekday doxology).
+id: matins-hymn-passiontide
+text:
+  la: >-
+    Pange, lingua, gloriósi
+
+    Prœlium certáminis,
+
+    Et super Crucis trophǽo
+
+    Dic triúmphum nóbilem,
+
+    Quáliter Redémptor orbis
+
+    Immolátus vícerit.
+
+
+    De paréntis protoplásti
+
+    Fraude Factor cóndolens,
+
+    Quando pomi noxiális
+
+    Morsu in mortem córruit,
+
+    Ipse lignum tunc notávit,
+
+    Damna ligni ut sólveret.
+
+
+    Hoc opus nostræ salútis
+
+    Ordo depopóscerat,
+
+    Multifórmis proditóris
+
+    Ars ut artem fálleret,
+
+    Et medélam ferret inde,
+
+    Hostis unde lǽserat.
+
+
+    Quando venit ergo sacri
+
+    Plenitúdo témporis,
+
+    Missus est ab arce Patris
+
+    Natus, orbis Cónditor,
+
+    Atque ventre virgináli
+
+    Carne amíctus pródiit.
+
+
+    Vagit infans inter arcta
+
+    Cónditus præsépia:
+
+    Membra pannis involúta
+
+    Virgo Mater álligat:
+
+    Et manus, pedésque, et crura
+
+    Stricta cingit fáscia.
+
+
+    Glória, et honor Deo
+
+    Usqueqáque Altíssimo,
+
+    Una Patri, Filióque;
+
+    Inclyto Paráclito:
+
+    Cui laus est et potéstas,
+
+    Per ætérna sǽcula. Amen.
+  en: >-
+    Sing, my tongue, the glorious battle
+
+    Sing the last, the dread affray;
+
+    O'er the cross, the victor's trophy,
+
+    Sound the high triumphal lay:
+
+    Tell how Christ, the world's Redeemer,
+
+    As a victim won the day.
+
+
+    God, his Maker, sorely grieving
+
+    That the first-made Adam fell,
+
+    When he ate the fruit of sorrow,
+
+    Whose reward was death and hell,
+
+    Noted then this wood, the ruin
+
+    Of the ancient wood to quell.
+
+
+    For the work of our salvation
+
+    Needs would have his order so,
+
+    And the multiform deceiver's
+
+    Art by art would overthrow,
+
+    And from thence would bring the med'cine
+
+    Whence the insult of the foe.
+
+
+    Wherefore, when the sacred fullness
+
+    Of the appointed time was come,
+
+    This world's Maker left his Father,
+
+    Sent the heav'nly mansion from,
+
+    And proceeded, God Incarnate,
+
+    Of the Virgin's holy womb.
+
+
+    Weeps the infant in the manger
+
+    That in Bethlehem's stable stands;
+
+    And his limbs the Virgin Mother
+
+    Doth compose in swaddling bands,
+
+    Meetly thus in linen folding
+
+    Of her God the feet and hands.
+
+
+    To the Trinity be glory
+
+    Everlasting, as is meet;
+
+    Equal to the Father, equal
+
+    To the Son, and Paraclete:
+
+    Trinal Unity, whose praises
+
+    All created things repeat. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-hymn-septuagesima.yml

@@ -0,0 +1,174 @@
+# Septuagesima-tide's own Matins hymn ("Primo diérum ómnium" —
+# Psalterium/Special/Matutinum Special.txt's "Day0 Hymnus1M", a genuinely
+# separate full text from the secular "Day0 Hymnus1", not a word-swap).
+# Live-verified 2026-02-01 (Septuagesima Sunday itself). Checked before
+# `matins-hymn-sunday.yml` in `resolveMatinsHymn` — this only ever
+# applies during Septuagesima/Sexagesima/Quinquagesima, a real, narrow
+# season vu's calendar already tracks (`day.season === 'septuagesima'`)
+# but that the shared `seasonalOfficeSuffix` (Lauds/Vespers' own) doesn't
+# cover — checked directly here rather than added there, since Lauds/
+# Vespers have no matching Septuagesima content authored yet and adding
+# it to that shared function would silently blank their own chapter/
+# hymn instead of falling through to their current (imperfect but real)
+# weekday default. See TODO.md.
+#
+# Self-contained, own closing doxology baked in — happens to be
+# byte-identical to the shared "Praesta, Pater piíssime..." weekday
+# doxology, but this hour doesn't use the split/append mechanism at all
+# for this seasonal tier (see matins-hymn-sunday.yml's own header).
+id: matins-hymn-septuagesima
+text:
+  la: >-
+    Primo diérum ómnium,
+
+    Quo mundus extat cónditus,
+
+    Vel quo resúrgens Cónditor
+
+    Nos morte victa líberat.
+
+
+    Pulsis procul torpóribus
+
+    Surgámus omnes ócius,
+
+    Et nocte quærámus pium
+
+    Sicut prophétam nóvimus.
+
+
+    Nostras preces ut áudiat,
+
+    Suámque dextram pórrigat:
+
+    Et expiátos sórdibus
+
+    Reddat polórum sédibus.
+
+
+    Ut quique sacratíssimo
+
+    Hujus diéi témpore
+
+    Horis quiétis psállimus,
+
+    Donis beátis múneret.
+
+
+    Jam nunc patérna cláritas
+
+    Te postulámus áffatim:
+
+    Absit libído sórdidans
+
+    Et omnis actus nóxius.
+
+
+    Ne fœda sit, vel lúbrica
+
+    Compágo nostri córporis,
+
+    Per quem Avérni ígnibus
+
+    Ipsi cremémur ácrius.
+
+
+    Ob hoc Redémptor, quǽsumus,
+
+    Ut probra nostra díluas,
+
+    Vitæ perénnis cómmoda
+
+    Nobis benígne cónferas.
+
+
+    Quo carnis actu éxsules
+
+    Effécti ipsi cælibes,
+
+    Ut præstolámur cérnui,
+
+    Melos canámus glóriæ.
+
+
+    Præsta, Pater piíssime,
+
+    Patríque compar Únice,
+
+    Cum Spíritu Paráclito
+
+    Regnans per omne sǽculum. Amen.
+  en: >-
+    Hail day! whereon the One in Three
+
+    First formed the earth by sure decree,
+
+    The day its Maker rose again,
+
+    And vanquished death, and burst our chain.
+
+
+    Away with sleep and slothful ease
+
+    We raise our hearts and bend our knees,
+
+    And early seek the Lord of all,
+
+    Obedient to the Prophet's call.
+
+
+    That He may hearken to our prayer,
+
+    Stretch forth His strong right arm to spare,
+
+    And ev'ry past offense forgiven,
+
+    Restore us to our home in heaven.
+
+
+    Assembled here this holy day,
+
+    This holiest hour we raise the lay,
+
+    And O that He to whom we sing,
+
+    May now reward our offering!
+
+
+    O Father of unclouded light!
+
+    Keep us this day as in thy sight,
+
+    In word and deed that we may be
+
+    From ev'ry touch of evil free.
+
+
+    That this our body's mortal frame
+
+    May know no sin, and fear no shame,
+
+    Nor fire hereafter be the end
+
+    Of passions which our bosom rend.
+
+
+    Redeemer of the world, we pray
+
+    That thou wouldst wash our sins away,
+
+    And give us, of Thy boundless grace,
+
+    The blessings of the heavenly place.
+
+
+    Most Holy Father, hear our cry,
+
+    Through Jesus Christ our Lord most High
+
+    Who, with the Holy Ghost and thee
+
+    Shall live and reign eternally. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-hymn-sunday.yml

@@ -0,0 +1,80 @@
+# Sunday's own plain Matins hymn ("Nocte surgéntes vigilémus omnes" —
+# Psalterium/Special/Matutinum Special.txt's "Day0 Hymnus", Monastic
+# 1617's own "Day0 HymnusM" swap applied: "Víribus totis"/"beátam"/
+# "réboat" replacing the secular "Voce concórdi"/"perénnem"/"résonat").
+# Live-verified against 3 clean ordinary-time (Trinitytide) Sundays with
+# no season/octave/winning-saint override (2026-07-05, 2026-08-02,
+# 2026-09-06), all byte-identical.
+#
+# Self-contained with its own closing doxology stanza baked in (a fixed,
+# unique Sapphic-meter ending, "Præstet hoc nobis Déitas beáta..." — not
+# the shared iambic-dimeter "Praesta, Pater piíssime..." every weekday
+# ferial hymn uses) — same convention as every other self-contained
+# Matins hymn (see e.g. matins-hymn-common-of-an-apostle.yml).
+#
+# Septuagesima-tide has its own separate, genuinely different Sunday
+# hymn ("Primo diérum ómnium", `matins-hymn-septuagesima.yml`) — checked
+# before this one in `resolveMatinsHymn`'s precedence, same as Advent/
+# Lent/Passiontide/Paschaltide's own seasonal hymns. Advent/Lent/
+# Passiontide/Paschaltide's own Sunday hymns turned out identical to
+# their own ferial-weekday hymns (live-verified: a Lenten Tuesday and a
+# Lenten Sunday both render "Ex more docti mýstico"), unlike the plain
+# per-annum case here, where Sunday genuinely differs from the weekday
+# cycle (`matins-hymn-ferial*.yml`).
+id: matins-hymn-sunday
+text:
+  la: >-
+    Nocte surgéntes vigilémus omnes,
+
+    Semper in psalmis meditémur, atque
+
+    Víribus totis Dómino canámus
+
+    Dúlciter hymnos.
+
+
+    Ut pio Regi páriter canéntes,
+
+    Cum suis Sanctis mereámur aulam
+
+    Íngredi cæli, simul et beátam
+
+    Dúcere vitam.
+
+
+    Præstet hoc nobis Déitas beáta
+
+    Patris, ac Nati, paritérque Sancti
+
+    Spíritus, cujus réboat per omnem
+
+    Glória mundum. Amen.
+  en: >-
+    Now, from the slumbers of the night arising,
+
+    Chant we the holy psalmody of David,
+
+    Hymns to our Master, with a voice concordant,
+
+    Sweetly intoning.
+
+
+    So may our Monarch pitifully hear us,
+
+    That we may merit with his saints to enter
+
+    Mansions eternal, therewithal possessing
+
+    Joy beatific.
+
+
+    This be our portion, God forever blessed,
+
+    Father eternal, Son, and Holy Spirit,
+
+    Whose is the glory, which through all creation
+
+    Ever resoundeth. Amen.
+status:
+  la: verified
+  en: verified

src/hours/matins.ts

@@ -450,6 +450,21 @@ function resolveMatinsHymn(day: LiturgicalDay): ResolvedText {
       return commonHymn;
     }
   }
+  // Septuagesima-tide checked directly by `day.season`, not folded into
+  // `seasonalOfficeSuffix` — that function is shared with Lauds/Vespers,
+  // which have no matching Septuagesima content authored yet; adding it
+  // there would silently blank their own chapter/hymn (resolveOfficeBundle
+  // requires all-or-nothing) instead of falling through to their current
+  // weekday default. Scoped to Matins alone until Lauds/Vespers' own
+  // Septuagesima content exists too (see TODO.md). Its own hymn ("Primo
+  // diérum ómnium") is a genuinely separate seasonal text from the plain
+  // Sunday/ferial one below, live-verified 2026-02-01.
+  if (day.season === 'septuagesima') {
+    const septuagesima = resolveCommon('matins-hymn-septuagesima');
+    if (septuagesima.status.la !== 'missing' || septuagesima.status.en !== 'missing') {
+      return septuagesima;
+    }
+  }
   const seasonSuffix = seasonalOfficeSuffix(day.season);
   if (seasonSuffix) {
     const seasonal = resolveCommon(`matins-hymn-${seasonSuffix}`);
@@ -457,6 +472,16 @@ function resolveMatinsHymn(day: LiturgicalDay): ResolvedText {
       return seasonal;
     }
   }
+  // Sunday's own plain hymn ("Nocte surgéntes"), self-contained (own
+  // doxology baked in, unlike the shared weekday one below) — checked
+  // here, after every season/octave/Common tier above but before the
+  // Monday-Saturday ferial cycle, live-verified 2026-09-04.
+  if (day.weekday === 'sunday') {
+    const sunday = resolveCommon('matins-hymn-sunday');
+    if (sunday.status.la !== 'missing' || sunday.status.en !== 'missing') {
+      return sunday;
+    }
+  }
   // The plain ferial hymn's own Monastic source (Day1-6 Hymnus, Psalterium/
   // Special/Matutinum Special.txt) carries a real seasonal-doxology
   // substitution marker (live-checked 2026-09-03) — unlike the Advent/
@@ -470,8 +495,9 @@ function resolveMatinsHymn(day: LiturgicalDay): ResolvedText {
   // text — a real gap uncovered when the user noticed Friday showing
   // Monday's own hymn, and Saturday's own gap found the same day by
   // asking what actually renders on a real Ember Saturday (see
-  // matins-hymn-ferial.yml's header for why Sunday alone still falls to
+  // matins-hymn-ferial.yml's header for why Monday alone still falls to
-  // the plain `matins-hymn-ferial` id as a documented placeholder).
+  // the plain `matins-hymn-ferial` id, since Monday's own text simply
+  // lives there unsuffixed).
   const weekdayFerialHymnIds: Partial<Record<Weekday, string>> = {
     tuesday: 'matins-hymn-ferial-tuesday',
     wednesday: 'matins-hymn-ferial-wednesday',

tests/hours/matins.test.ts

@@ -774,9 +774,9 @@ describe('resolveOrdo("matins", ...) Assumption-octave hymn fallback (2026-08-22
   });
 
   it("a plain ferial day outside the octave still gets the plain ferial hymn, unaffected", () => {
-    // FERIAL_DATE (2026-12-01) is a Tuesday -- see the identical note on
+    // FERIAL_DATE (2026-12-01) is a Tuesday in Advent -- see the identical
-    // the other FERIAL_DATE hymn assertion below.
+    // note on the other FERIAL_DATE hymn assertion below.
-    expect(hymnLatin(FERIAL_DATE)).toContain('Consors patérni lúminis');
+    expect(hymnLatin(FERIAL_DATE)).toContain('Verbum supérnum, pródiens');
   });
 });
 
@@ -1074,11 +1074,12 @@ describe('resolveOrdo("matins", ...) Common-of-an-Apostle hymn + invitatory (202
   });
 
   it('a plain ferial day is unaffected -- still falls through to the plain ferial hymn and invitatory antiphon', () => {
-    // FERIAL_DATE (2026-12-01) is a Tuesday, so this is Tuesday's own
+    // FERIAL_DATE (2026-12-01) is a Tuesday in Advent, so since Advent's
-    // ferial hymn ("Consors patérni lúminis") since 2026-09-04's weekday-
+    // own Matins hymn was authored (2026-09-04), this is Advent's own
-    // specific hymn fix -- previously every weekday fell through to the
+    // seasonal hymn ("Verbum supérnum, pródiens"), not Tuesday's own
-    // same (mislabeled) Monday text ("Somno reféctis ártubus").
+    // ferial one -- season outranks weekday in resolveMatinsHymn's own
-    expect(hymnLatin(FERIAL_DATE)).toContain('Consors patérni lúminis');
+    // precedence, same as everywhere else.
+    expect(hymnLatin(FERIAL_DATE)).toContain('Verbum supérnum, pródiens');
     expect(invitatoryFullLatin(FERIAL_DATE)).toContain('Veníte');
     expect(invitatoryFullLatin(FERIAL_DATE)).not.toContain('Regem Apostolórum');
   });