From da1818a73de736dffd1580137352c32bea81be8c Mon Sep 17 00:00:00 2001
From: Lukasz Kasprzak <lukas@labunix.xyz>
Date: Mon, 3 Aug 2026 23:34:22 +0200
Subject: i18n: rank and colour vocabulary tables

---
 internal/i18n/vocab_test.go | 54 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 internal/i18n/vocab_test.go

(limited to 'internal/i18n/vocab_test.go')

diff --git a/internal/i18n/vocab_test.go b/internal/i18n/vocab_test.go
new file mode 100644
index 0000000..73115bb
--- /dev/null
+++ b/internal/i18n/vocab_test.go
@@ -0,0 +1,54 @@
+package i18n
+
+import (
+	"testing"
+
+	"github.com/lukaszkasprzak/lectio/internal/calendar"
+)
+
+// Every rank and colour the calendar can emit must have a word in every shipped
+// language. This is the guard against adding a constant later and silently
+// rendering a raw key like "class-2" in the UI.
+func TestVocabularyCoversEveryConstant(t *testing.T) {
+	ranks := []calendar.Rank{
+		calendar.RankFerial, calendar.RankOptional, calendar.RankMemorial,
+		calendar.RankFeast, calendar.RankSolemnity,
+		calendar.RankClass1, calendar.RankClass2, calendar.RankClass3,
+		calendar.RankClass4, calendar.RankCommemoration,
+	}
+	colours := []calendar.Colour{
+		calendar.White, calendar.Red, calendar.Green,
+		calendar.Violet, calendar.Rose, calendar.Black,
+	}
+	for _, lang := range []string{"en", "pl"} {
+		ui := Get(lang)
+		for _, r := range ranks {
+			if ui.Rank[string(r)] == "" {
+				t.Errorf("%s: no rank word for %q", lang, r)
+			}
+		}
+		for _, c := range colours {
+			if ui.Colour[string(c)] == "" {
+				t.Errorf("%s: no colour word for %q", lang, c)
+			}
+		}
+	}
+}
+
+// The English rank words must not change: lectio's CLI has printed these since
+// before the table existed, and English users' output should be untouched.
+func TestEnglishRankWordingUnchanged(t *testing.T) {
+	want := map[string]string{
+		"solemnity": "solemnity", "feast": "feast", "memorial": "memorial",
+		"optional": "optional memorial", "ferial": "feria",
+		"class-1": "I class", "class-2": "II class",
+		"class-3": "III class", "class-4": "IV class",
+		"commemoration": "commemoration",
+	}
+	ui := Get("en")
+	for k, v := range want {
+		if got := ui.Rank[k]; got != v {
+			t.Errorf("rank[%q] = %q, want %q", k, got, v)
+		}
+	}
+}
-- 
cgit v1.3


From 14c4540d3f06299bf65d74ea864ae7c6c4c33f72 Mon Sep 17 00:00:00 2001
From: Lukasz Kasprzak <lukas@labunix.xyz>
Date: Mon, 3 Aug 2026 23:39:49 +0200
Subject: i18n: drop the colour word table, it has no consumer

---
 internal/i18n/golden_test.go |  8 --------
 internal/i18n/i18n.go        |  6 ------
 internal/i18n/lang/en.ini    |  6 ------
 internal/i18n/lang/pl.ini    |  6 ------
 internal/i18n/vocab_test.go  | 11 +----------
 5 files changed, 1 insertion(+), 36 deletions(-)

(limited to 'internal/i18n/vocab_test.go')

diff --git a/internal/i18n/golden_test.go b/internal/i18n/golden_test.go
index b3ad125..d07d20a 100644
--- a/internal/i18n/golden_test.go
+++ b/internal/i18n/golden_test.go
@@ -30,10 +30,6 @@ var enUI = UI{
 		"class-3": "III class", "class-4": "IV class",
 		"commemoration": "commemoration",
 	},
-	Colour: map[string]string{
-		"white": "white", "red": "red", "green": "green",
-		"violet": "violet", "rose": "rose", "black": "black",
-	},
 	FooterKeys:            "tab/⇧tab version  ←/→ day  d date  j/k scroll  space/b page  g/G top/bottom  q quit",
 	Loading:               "loading…",
 	NoReadingsFor:         "no readings for ",
@@ -130,10 +126,6 @@ var plUI = UI{
 		"class-3": "III klasy", "class-4": "IV klasy",
 		"commemoration": "komemoracja",
 	},
-	Colour: map[string]string{
-		"white": "biały", "red": "czerwony", "green": "zielony",
-		"violet": "fioletowy", "rose": "różowy", "black": "czarny",
-	},
 	FooterKeys:            "tab/⇧tab wersja  ←/→ dzień  d data  j/k przewiń  spacja/b strona  g/G góra/dół  q wyjście",
 	Loading:               "ładowanie…",
 	NoReadingsFor:         "brak czytań na ",
diff --git a/internal/i18n/i18n.go b/internal/i18n/i18n.go
index 3928da8..356cc66 100644
--- a/internal/i18n/i18n.go
+++ b/internal/i18n/i18n.go
@@ -30,12 +30,6 @@ type UI struct {
 	// by the dlectio app's day banner and calendar rows.
 	Rank map[string]string
 
-	// Colour names each normalized liturgical colour, keyed by the string form
-	// of calendar.Colour (white, red, green, violet, rose, black). Rendered by
-	// the CLI's day header only -- the dlectio app draws a coloured swatch
-	// instead and deliberately shows no colour word.
-	Colour map[string]string
-
 	// TUI keybar and status messages. NoReadingsFor and ErrorPrefix each
 	// carry their own single trailing space (the TUI concatenates a date or
 	// error string directly onto them, no separator added at the call site).
diff --git a/internal/i18n/lang/en.ini b/internal/i18n/lang/en.ini
index 12adf7c..a2b53f3 100644
--- a/internal/i18n/lang/en.ini
+++ b/internal/i18n/lang/en.ini
@@ -17,12 +17,6 @@ rank.ferial = feria
 rank.memorial = memorial
 rank.optional = optional memorial
 rank.solemnity = solemnity
-colour.black = black
-colour.green = green
-colour.red = red
-colour.rose = rose
-colour.violet = violet
-colour.white = white
 footer_keys = tab/⇧tab version  ←/→ day  d date  j/k scroll  space/b page  g/G top/bottom  q quit
 loading = loading…
 no_readings_for = "no readings for "
diff --git a/internal/i18n/lang/pl.ini b/internal/i18n/lang/pl.ini
index 3521718..d1817f9 100644
--- a/internal/i18n/lang/pl.ini
+++ b/internal/i18n/lang/pl.ini
@@ -17,12 +17,6 @@ rank.ferial = dzień powszedni
 rank.memorial = wspomnienie obowiązkowe
 rank.optional = wspomnienie dowolne
 rank.solemnity = uroczystość
-colour.black = czarny
-colour.green = zielony
-colour.red = czerwony
-colour.rose = różowy
-colour.violet = fioletowy
-colour.white = biały
 footer_keys = tab/⇧tab wersja  ←/→ dzień  d data  j/k przewiń  spacja/b strona  g/G góra/dół  q wyjście
 loading = ładowanie…
 no_readings_for = "brak czytań na "
diff --git a/internal/i18n/vocab_test.go b/internal/i18n/vocab_test.go
index 73115bb..d25533a 100644
--- a/internal/i18n/vocab_test.go
+++ b/internal/i18n/vocab_test.go
@@ -6,7 +6,7 @@ import (
 	"github.com/lukaszkasprzak/lectio/internal/calendar"
 )
 
-// Every rank and colour the calendar can emit must have a word in every shipped
+// Every rank the calendar can emit must have a word in every shipped
 // language. This is the guard against adding a constant later and silently
 // rendering a raw key like "class-2" in the UI.
 func TestVocabularyCoversEveryConstant(t *testing.T) {
@@ -16,10 +16,6 @@ func TestVocabularyCoversEveryConstant(t *testing.T) {
 		calendar.RankClass1, calendar.RankClass2, calendar.RankClass3,
 		calendar.RankClass4, calendar.RankCommemoration,
 	}
-	colours := []calendar.Colour{
-		calendar.White, calendar.Red, calendar.Green,
-		calendar.Violet, calendar.Rose, calendar.Black,
-	}
 	for _, lang := range []string{"en", "pl"} {
 		ui := Get(lang)
 		for _, r := range ranks {
@@ -27,11 +23,6 @@ func TestVocabularyCoversEveryConstant(t *testing.T) {
 				t.Errorf("%s: no rank word for %q", lang, r)
 			}
 		}
-		for _, c := range colours {
-			if ui.Colour[string(c)] == "" {
-				t.Errorf("%s: no colour word for %q", lang, c)
-			}
-		}
 	}
 }
 
-- 
cgit v1.3


From f94ceaae997bce2168a5ab9e64a0c3afeafe0cf6 Mon Sep 17 00:00:00 2001
From: Lukasz Kasprzak <lukas@labunix.xyz>
Date: Mon, 3 Aug 2026 23:50:26 +0200
Subject: i18n: correct rank doc comments and pin the Polish wording

---
 internal/i18n/i18n.go        |  7 +++++--
 internal/i18n/vocab_test.go  | 22 ++++++++++++++++++++++
 internal/liturgy/section.go  |  6 +++++-
 internal/readings/offline.go |  7 ++++---
 4 files changed, 36 insertions(+), 6 deletions(-)

(limited to 'internal/i18n/vocab_test.go')

diff --git a/internal/i18n/i18n.go b/internal/i18n/i18n.go
index 356cc66..6785705 100644
--- a/internal/i18n/i18n.go
+++ b/internal/i18n/i18n.go
@@ -26,8 +26,11 @@ type UI struct {
 	// Rank names each liturgical rank, keyed by the string form of
 	// calendar.Rank. Two vocabularies share the map: the Ordinary Form's
 	// ferial/optional/memorial/feast/solemnity and the 1962 form's
-	// class-1..class-4/commemoration. Rendered by the CLI's day header and
-	// by the dlectio app's day banner and calendar rows.
+	// class-1..class-4/commemoration. The English values are hand-synced to
+	// agree with internal/cli/liturgy.go's own rankLabel() switch, but the
+	// CLI does not read this map -- it renders rank independently, and the
+	// two are kept in sync by hand. The actual consumers of this map are the
+	// dlectio app's day banner and calendar rows.
 	Rank map[string]string
 
 	// TUI keybar and status messages. NoReadingsFor and ErrorPrefix each
diff --git a/internal/i18n/vocab_test.go b/internal/i18n/vocab_test.go
index d25533a..bcd3464 100644
--- a/internal/i18n/vocab_test.go
+++ b/internal/i18n/vocab_test.go
@@ -43,3 +43,25 @@ func TestEnglishRankWordingUnchanged(t *testing.T) {
 		}
 	}
 }
+
+// The Polish rank words must be exactly this spelling, diacritics included:
+// TestVocabularyCoversEveryConstant only checks non-emptiness, so a typo
+// (e.g. "uroczystosc" for "uroczystość", or a wrong diacritic) would pass
+// silently without this pin. Polish correctness is the whole point of this
+// project.
+func TestPolishRankWordingUnchanged(t *testing.T) {
+	want := map[string]string{
+		"solemnity": "uroczystość", "feast": "święto",
+		"memorial": "wspomnienie obowiązkowe", "optional": "wspomnienie dowolne",
+		"ferial":  "dzień powszedni",
+		"class-1": "I klasy", "class-2": "II klasy",
+		"class-3": "III klasy", "class-4": "IV klasy",
+		"commemoration": "komemoracja",
+	}
+	ui := Get("pl")
+	for k, v := range want {
+		if got := ui.Rank[k]; got != v {
+			t.Errorf("rank[%q] = %q, want %q", k, got, v)
+		}
+	}
+}
diff --git a/internal/liturgy/section.go b/internal/liturgy/section.go
index 485a45f..baf2b9d 100644
--- a/internal/liturgy/section.go
+++ b/internal/liturgy/section.go
@@ -36,6 +36,10 @@ type DayInfo struct {
 	// Rank is the normalized liturgical rank of the observed celebration:
 	// the Ordinary Form's "ferial", "optional", "memorial", "feast",
 	// "solemnity", or the 1962 form's "class-1".."class-4",
-	// "commemoration". Empty when the day carries no rank.
+	// "commemoration". The engine always supplies a rank: an unset or
+	// unrecognised rank on a sanctoral celebration defaults to "ferial"
+	// (calendar.buildCelebration), and every temporal-day constructor sets
+	// one explicitly. Consumers must not treat an empty Rank as meaning "no
+	// celebration".
 	Rank string
 }
diff --git a/internal/readings/offline.go b/internal/readings/offline.go
index 2f96c14..59a03fa 100644
--- a/internal/readings/offline.go
+++ b/internal/readings/offline.go
@@ -109,9 +109,10 @@ func sectionsFor(rs []calendar.Reading, form, lang, siglaLang string, tbl *bible
 	return out
 }
 
-// dayInfo builds the header (celebration name, liturgical colour) for the
-// computed day. Season is left empty: the celebration name already carries the
-// temporal identity for temporal days, and the header is a nice-to-have.
+// dayInfo builds the header (celebration name, liturgical colour, rank) for
+// the computed day. Season is left empty: the celebration name already
+// carries the temporal identity for temporal days, and the header is a
+// nice-to-have.
 func dayInfo(cfg config.Config, day calendar.LiturgicalDay) liturgy.DayInfo {
 	return liturgy.DayInfo{
 		Name:   celebrationName(cfg, day.Observed),
-- 
cgit v1.3


From 70c504148ca9ddf7fdb31162f5f8da7e118fca45 Mon Sep 17 00:00:00 2001
From: Lukasz Kasprzak <lukas@labunix.xyz>
Date: Tue, 4 Aug 2026 00:05:55 +0200
Subject: i18n: pin the Polish part labels; cross-reference the part-ID orders

---
 internal/i18n/vocab_test.go  | 31 +++++++++++++++++++++++++++++++
 internal/readings/offline.go |  9 +++++++++
 internal/render/render.go    |  8 ++++++++
 3 files changed, 48 insertions(+)

(limited to 'internal/i18n/vocab_test.go')

diff --git a/internal/i18n/vocab_test.go b/internal/i18n/vocab_test.go
index bcd3464..97c09d6 100644
--- a/internal/i18n/vocab_test.go
+++ b/internal/i18n/vocab_test.go
@@ -65,3 +65,34 @@ func TestPolishRankWordingUnchanged(t *testing.T) {
 		}
 	}
 }
+
+// The Polish part labels must be exactly this spelling, diacritics included,
+// and no others. This asserts against plUI directly, NOT i18n.Get("pl"):
+// Get overlays the embedded English baseline first and then the Polish file
+// on top (lang.go's Get), so a label present in English and missing only
+// from plUI.PartLabel would resolve through Get("pl") to the identical
+// English word rather than "" -- invisible to
+// internal/readings/partids_test.go's TestEveryPartIDHasLabels, which only
+// checks Get(lang) for non-emptiness. plUI is the unmerged golden source
+// with no fallback, so a missing entry is genuinely absent there, which is
+// the only way to catch this. The exact key-count check guards against a
+// future addition to plUI.PartLabel slipping in unpinned.
+func TestPolishPartLabelWordingUnchanged(t *testing.T) {
+	want := map[string]string{
+		"pierwsze_czytanie": "1. czytanie",
+		"psalm":             "Psalm",
+		"drugie_czytanie":   "2. czytanie",
+		"aklamacja":         "Aklamacja",
+		"ewangelia":         "Ewangelia",
+		"epistola":          "Lekcja",
+		"evangelium":        "Ewangelia",
+	}
+	if len(plUI.PartLabel) != len(want) {
+		t.Fatalf("plUI.PartLabel has %d keys, want %d: %v", len(plUI.PartLabel), len(want), plUI.PartLabel)
+	}
+	for k, v := range want {
+		if got, ok := plUI.PartLabel[k]; !ok || got != v {
+			t.Errorf("plUI.PartLabel[%q] = %q (present=%v), want %q", k, got, ok, v)
+		}
+	}
+}
diff --git a/internal/readings/offline.go b/internal/readings/offline.go
index c2c276b..608abd8 100644
--- a/internal/readings/offline.go
+++ b/internal/readings/offline.go
@@ -84,6 +84,15 @@ func efPartHeading(part, lang string) (id, heading string) {
 
 // ofPartOrder and efPartOrder are the display orders of each lectionary's
 // sections. They are the single source of truth for which part IDs exist.
+//
+// ofPartOrder's five modern IDs must remain the same *set* as
+// internal/render/render.go's modernPartOrder, which lists them in a
+// different, deliberate order (prefix-match determinism for
+// render.LocalizeHeading, unrelated to display order). Nothing enforces
+// that agreement mechanically -- internal/readings and internal/render do
+// not import each other (adding a cross-package test would create a new
+// dependency edge that does not exist today) -- so if a sixth modern part
+// is ever added here, add it to modernPartOrder too, by hand.
 var (
 	ofPartOrder = []string{"pierwsze_czytanie", "psalm", "drugie_czytanie", "aklamacja", "ewangelia"}
 	efPartOrder = []string{"epistola", "evangelium"}
diff --git a/internal/render/render.go b/internal/render/render.go
index c744aac..3437396 100644
--- a/internal/render/render.go
+++ b/internal/render/render.go
@@ -29,6 +29,14 @@ func versionLabel(version, lang string) string {
 // than ranging over i18n.UI.PartLabel (a map, so Go randomises its
 // iteration order). None of the five labels is a prefix of another, so the
 // order never changes which one matches, only determinism.
+//
+// Its *set* of five IDs must match internal/readings/offline.go's
+// ofPartOrder, which lists the same modern IDs in a different, deliberate
+// order (display order, unrelated to this package's prefix-match need).
+// Nothing enforces that agreement mechanically -- internal/render and
+// internal/readings do not import each other (adding a cross-package test
+// would create a new dependency edge that does not exist today) -- so if a
+// sixth modern part is ever added to ofPartOrder, add it here too, by hand.
 var modernPartOrder = []string{"pierwsze_czytanie", "drugie_czytanie", "psalm", "aklamacja", "ewangelia"}
 
 // LocalizeHeading swaps a modern (niedziela.pl) section heading's leading
-- 
cgit v1.3


From 4855ef2a667b7ea71092e0582db5aff1838a0d63 Mon Sep 17 00:00:00 2001
From: Lukasz Kasprzak <lukas@labunix.xyz>
Date: Wed, 5 Aug 2026 22:24:53 +0200
Subject: calendar/readings: report Sunday as its own display rank, not
 solemnity

The Ordinary Form's Table of Liturgical Days treats Sunday as its own
category, never a solemnity. temporal.go's sundayDay() already marks these
days distinctly from named solemnities (Class stays unset, unlike solemn()'s
ClassLord); internal/readings/offline.go now reads that existing signal to
relabel the REPORTED rank to "sunday" for ordinary and privileged-season
Sundays alike, leaving Celebration.Rank, ofRankOrder and all precedence
untouched. Named solemnities landing on a Sunday (Easter, Pentecost, ...)
and feasts of the Lord (Holy Family) keep reporting their own rank. The 1962
form is untouched.

Added calendar.RankSunday (display-only, deliberately excluded from
ofRankOrder), the i18n Sunday/niedziela words, and a test pinning the exact
dates from the original bug report.
---
 internal/calendar/types.go         | 12 ++++++++++
 internal/i18n/golden_test.go       |  4 ++--
 internal/i18n/lang/en.ini          |  1 +
 internal/i18n/lang/pl.ini          |  1 +
 internal/i18n/vocab_test.go        |  6 ++---
 internal/readings/offline.go       | 48 +++++++++++++++++++++++++++++++++++++-
 internal/readings/readings_test.go | 37 +++++++++++++++++++++++++++++
 7 files changed, 103 insertions(+), 6 deletions(-)

(limited to 'internal/i18n/vocab_test.go')

diff --git a/internal/calendar/types.go b/internal/calendar/types.go
index 298e49d..6d828f1 100644
--- a/internal/calendar/types.go
+++ b/internal/calendar/types.go
@@ -17,6 +17,18 @@ const (
 	RankFeast     Rank = "feast"     //
 	RankSolemnity Rank = "solemnity" //
 
+	// RankSunday is a DISPLAY-ONLY rank: in the 1969 Universal Norms' Table of
+	// Liturgical Days, Sunday is its own category, never a solemnity (Sundays
+	// of Christmas Time/Ordinary Time are band 6, below feasts of the Lord;
+	// Sundays of Advent/Lent/Easter are band 2, above solemnities -- a flat
+	// Rank cannot express both bands, and this constant does not try to).
+	// Nothing in this package ever assigns it to Celebration.Rank, and it MUST
+	// NOT be added to ofRankOrder below: ofRankOrder's default case (0,
+	// ferial-level) would make every Sunday lose every precedence contest.
+	// Callers that want it derive it themselves from the already-computed,
+	// unchanged Celebration (see internal/readings/offline.go's displayRank).
+	RankSunday Rank = "sunday"
+
 	// Extraordinary Form ranks (1960 Code of Rubrics): I-IV class + commemoration.
 	RankClass1        Rank = "class-1"
 	RankClass2        Rank = "class-2"
diff --git a/internal/i18n/golden_test.go b/internal/i18n/golden_test.go
index b32a259..d06d63b 100644
--- a/internal/i18n/golden_test.go
+++ b/internal/i18n/golden_test.go
@@ -27,7 +27,7 @@ var enUI = UI{
 	},
 	Rank: map[string]string{
 		"solemnity": "solemnity", "feast": "feast", "memorial": "memorial",
-		"optional": "optional memorial", "ferial": "feria",
+		"optional": "optional memorial", "ferial": "feria", "sunday": "Sunday",
 		"class-1": "I class", "class-2": "II class",
 		"class-3": "III class", "class-4": "IV class",
 		"commemoration": "commemoration",
@@ -125,7 +125,7 @@ var plUI = UI{
 	Rank: map[string]string{
 		"solemnity": "uroczystość", "feast": "święto",
 		"memorial": "wspomnienie obowiązkowe", "optional": "wspomnienie dowolne",
-		"ferial":  "dzień powszedni",
+		"ferial": "dzień powszedni", "sunday": "niedziela",
 		"class-1": "I klasy", "class-2": "II klasy",
 		"class-3": "III klasy", "class-4": "IV klasy",
 		"commemoration": "komemoracja",
diff --git a/internal/i18n/lang/en.ini b/internal/i18n/lang/en.ini
index 60a5f32..4abd5d1 100644
--- a/internal/i18n/lang/en.ini
+++ b/internal/i18n/lang/en.ini
@@ -19,6 +19,7 @@ rank.ferial = feria
 rank.memorial = memorial
 rank.optional = optional memorial
 rank.solemnity = solemnity
+rank.sunday = Sunday
 footer_keys = tab/⇧tab version  ←/→ day  d date  j/k scroll  space/b page  g/G top/bottom  q quit
 loading = loading…
 no_readings_for = "no readings for "
diff --git a/internal/i18n/lang/pl.ini b/internal/i18n/lang/pl.ini
index 5991938..4ae4ebf 100644
--- a/internal/i18n/lang/pl.ini
+++ b/internal/i18n/lang/pl.ini
@@ -19,6 +19,7 @@ rank.ferial = dzień powszedni
 rank.memorial = wspomnienie obowiązkowe
 rank.optional = wspomnienie dowolne
 rank.solemnity = uroczystość
+rank.sunday = niedziela
 footer_keys = tab/⇧tab wersja  ←/→ dzień  d data  j/k przewiń  spacja/b strona  g/G góra/dół  q wyjście
 loading = ładowanie…
 no_readings_for = "brak czytań na "
diff --git a/internal/i18n/vocab_test.go b/internal/i18n/vocab_test.go
index 97c09d6..d0fd603 100644
--- a/internal/i18n/vocab_test.go
+++ b/internal/i18n/vocab_test.go
@@ -12,7 +12,7 @@ import (
 func TestVocabularyCoversEveryConstant(t *testing.T) {
 	ranks := []calendar.Rank{
 		calendar.RankFerial, calendar.RankOptional, calendar.RankMemorial,
-		calendar.RankFeast, calendar.RankSolemnity,
+		calendar.RankFeast, calendar.RankSolemnity, calendar.RankSunday,
 		calendar.RankClass1, calendar.RankClass2, calendar.RankClass3,
 		calendar.RankClass4, calendar.RankCommemoration,
 	}
@@ -31,7 +31,7 @@ func TestVocabularyCoversEveryConstant(t *testing.T) {
 func TestEnglishRankWordingUnchanged(t *testing.T) {
 	want := map[string]string{
 		"solemnity": "solemnity", "feast": "feast", "memorial": "memorial",
-		"optional": "optional memorial", "ferial": "feria",
+		"optional": "optional memorial", "ferial": "feria", "sunday": "Sunday",
 		"class-1": "I class", "class-2": "II class",
 		"class-3": "III class", "class-4": "IV class",
 		"commemoration": "commemoration",
@@ -53,7 +53,7 @@ func TestPolishRankWordingUnchanged(t *testing.T) {
 	want := map[string]string{
 		"solemnity": "uroczystość", "feast": "święto",
 		"memorial": "wspomnienie obowiązkowe", "optional": "wspomnienie dowolne",
-		"ferial":  "dzień powszedni",
+		"ferial": "dzień powszedni", "sunday": "niedziela",
 		"class-1": "I klasy", "class-2": "II klasy",
 		"class-3": "III klasy", "class-4": "IV klasy",
 		"commemoration": "komemoracja",
diff --git a/internal/readings/offline.go b/internal/readings/offline.go
index be7c430..b2c16df 100644
--- a/internal/readings/offline.go
+++ b/internal/readings/offline.go
@@ -162,10 +162,56 @@ func dayInfo(cfg config.Config, day calendar.LiturgicalDay) liturgy.DayInfo {
 	return liturgy.DayInfo{
 		Name:   celebrationName(cfg, day.Observed),
 		Colour: string(day.Colour),
-		Rank:   string(day.Observed.Rank),
+		Rank:   displayRank(cfg, day),
 	}
 }
 
+// displayRank is the Ordinary Form's REPORTED rank for the observed
+// celebration -- it never changes calendar.Celebration.Rank (the engine's own
+// field, which drives precedence via ofRankOrder); it only relabels what is
+// handed to a caller here, after the engine has already finished computing.
+//
+// In the 1969 Universal Norms' Table of Liturgical Days, Sunday is its own
+// category, not a solemnity. The calendar engine's temporal.go builds every
+// "Nth Sunday of <season>" day (Ordinary Time, Advent, Lent, the Easter
+// season, Christmas time, and Palm Sunday) with sundayDay(), which sets
+// Rank=solemnity but leaves Class at its zero value (calendar.ClassNone) --
+// solemnity is a placeholder there, not a real classification. A genuinely
+// NAMED solemnity of the Lord that happens to fall on a Sunday (Easter Sunday
+// itself, Pentecost, Ascension/Corpus Christi when transferred, Trinity,
+// Christ the King, Christmas, Epiphany) is built by solemn(), which does set
+// Class=ClassLord, and must keep reporting "solemnity"; a feast of the Lord
+// (Holy Family, Baptism of the Lord) is Rank=feast already and is untouched.
+//
+// Investigated first: temporal.go's own Sunday bool (sundayDay's
+// `Sunday: !priv`) looked like the natural signal, but it does not reach
+// calendar.LiturgicalDay at all (LiturgicalDay carries no such field, only
+// the aggregate ObservedBand), and even if plumbed through it would be the
+// wrong signal here -- by its own doc comment it marks only the band-6
+// Christmas-time/Ordinary-time Sundays, not the band-2 Advent/Lent/Easter
+// Sundays this change must ALSO relabel (the 1st Sunday of Advent from the
+// original bug report is band 2, Privileged=true, Sunday=false). Using
+// Celebration.Class instead of that flag, or of temporalDay.Privileged,
+// covers exactly the sundayDay()-built set in both bands without adding any
+// new field: RankSolemnity + Layer=="temporal" + Class!=ClassLord occurs only
+// from sundayDay(), and (checked against every call site in temporal.go) only
+// ever on an actual Sunday, so the weekday check below is defensive, not
+// load-bearing.
+//
+// The Extraordinary Form (1962) has no such category and is untouched: this
+// only ever fires when the modern form is selected.
+func displayRank(cfg config.Config, day calendar.LiturgicalDay) string {
+	obs := day.Observed
+	if cfg.Selection().Form != "old" &&
+		day.Weekday == time.Sunday &&
+		obs.Layer == "temporal" &&
+		obs.Rank == calendar.RankSolemnity &&
+		obs.Class != calendar.ClassLord {
+		return string(calendar.RankSunday)
+	}
+	return string(obs.Rank)
+}
+
 // celebrationName is the observed celebration's name in the UI language,
 // resolved by naming.CelebrationName (name.<lang> -> English -> Latin ->
 // humanized slug). An empty result (unnamed feria) omits the header line.
diff --git a/internal/readings/readings_test.go b/internal/readings/readings_test.go
index 143b43e..1674d85 100644
--- a/internal/readings/readings_test.go
+++ b/internal/readings/readings_test.go
@@ -99,6 +99,43 @@ func TestLoadModern(t *testing.T) {
 	}
 }
 
+// TestSundayRankIsDisplayOnly guards the Ordinary Form's Sunday display rank.
+// Sunday is its own category in the 1969 Universal Norms' Table of Liturgical
+// Days -- never a solemnity -- so an ordinary "Nth Sunday of <season>" temporal
+// day (Ordinary Time, Advent, Lent, the Easter season, Christmas time; this
+// also covers Palm Sunday) must report "sunday". A NAMED solemnity of the Lord
+// that happens to fall on a Sunday (Easter Sunday itself, Pentecost) is a
+// genuine solemnity and must keep reporting "solemnity"; a feast of the Lord
+// (Holy Family) must keep reporting "feast". This is display-only: it must
+// never touch the engine's internal precedence, so the 1962 form (which has no
+// such Sunday category -- Sundays report their class exactly as before) is
+// asserted unchanged too. Dates are the ones from the original bug report,
+// plus the Easter/Pentecost/Holy Family dates they imply for the same
+// liturgical year.
+func TestSundayRankIsDisplayOnly(t *testing.T) {
+	cases := []struct {
+		date, lect, wantRank, why string
+	}{
+		{"2026-08-09", "new", "sunday", "19th Sunday in Ordinary Time"},
+		{"2026-11-29", "new", "sunday", "1st Sunday of Advent"},
+		{"2027-03-28", "new", "solemnity", "Easter Sunday itself"},
+		{"2027-05-16", "new", "solemnity", "Pentecost"},
+		{"2026-12-27", "new", "feast", "Holy Family"},
+		{"2026-08-09", "traditional", "class-2", "1962 Sunday after Pentecost"},
+		{"2026-11-29", "traditional", "class-1", "1962 1st Sunday of Advent"},
+	}
+	for _, c := range cases {
+		cfg := config.Config{Lectionary: c.lect}
+		_, info, err := Load(cfg, Options{Date: c.date, All: true})
+		if err != nil {
+			t.Fatalf("%s (%s, %s): Load: %v", c.date, c.lect, c.why, err)
+		}
+		if info.Rank != c.wantRank {
+			t.Errorf("%s (%s, %s): Rank = %q, want %q (name=%q)", c.date, c.lect, c.why, info.Rank, c.wantRank, info.Name)
+		}
+	}
+}
+
 // TestLoadTraditional computes the Extraordinary Form day offline: it never
 // needs the network, and yields the EF epistle+gospel with a header name.
 func TestLoadTraditional(t *testing.T) {
-- 
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