feat(faith): add liturgical calendar with 1969/1962 rite toggle

Adds `/faith/calendar`, `/glaube/kalender`, `/fides/calendarium` route backed by
romcal v3 + @romcal/calendar.general-roman with native EN/DE/LA locales. Month
grid, today hero, and day detail panel use liturgical colors from the rubric.

Header gets a segmented 1969/1962 pill toggle; selecting 1962 shows a WIP
placeholder (Tridentine calendar data not yet wired up).

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "homepage",
-	"version": "1.31.4",
+	"version": "1.32.0",
 	"private": true,
 	"type": "module",
 	"scripts": {
@@ -49,6 +49,7 @@
 		"@huggingface/transformers": "^4.0.1",
 		"@lucide/svelte": "^1.7.0",
 		"@nicolo-ribaudo/chokidar-2": "2.1.8-no-fsevents.3",
+		"@romcal/calendar.general-roman": "3.0.0-dev.125",
 		"@sveltejs/adapter-node": "^5.5.4",
 		"@tauri-apps/plugin-geolocation": "^2.3.2",
 		"barcode-detector": "^3.1.2",
@@ -59,6 +60,7 @@
 		"leaflet": "^1.9.4",
 		"mongoose": "^9.4.1",
 		"node-cron": "^4.2.1",
+		"romcal": "3.0.0-dev.125",
 		"sharp": "^0.34.5",
 		"web-haptics": "^0.0.6"
 	},

pnpm-lock.yaml

@@ -20,6 +20,9 @@ importers:
       '@nicolo-ribaudo/chokidar-2':
         specifier: 2.1.8-no-fsevents.3
         version: 2.1.8-no-fsevents.3
+      '@romcal/calendar.general-roman':
+        specifier: 3.0.0-dev.125
+        version: 3.0.0-dev.125(romcal@3.0.0-dev.125(typescript@6.0.2))
       '@sveltejs/adapter-node':
         specifier: ^5.5.4
         version: 5.5.4(@sveltejs/kit@2.56.1(@sveltejs/vite-plugin-svelte@7.0.0(svelte@5.55.1)(vite@8.0.4(@emnapi/core@1.9.2)(@emnapi/runtime@1.9.1)(@types/node@22.18.0)(esbuild@0.27.3)(terser@5.46.0)))(svelte@5.55.1)(typescript@6.0.2)(vite@8.0.4(@emnapi/core@1.9.2)(@emnapi/runtime@1.9.1)(@types/node@22.18.0)(esbuild@0.27.3)(terser@5.46.0)))
@@ -50,6 +53,9 @@ importers:
       node-cron:
         specifier: ^4.2.1
         version: 4.2.1
+      romcal:
+        specifier: 3.0.0-dev.125
+        version: 3.0.0-dev.125(typescript@6.0.2)
       sharp:
         specifier: ^0.34.5
         version: 0.34.5
@@ -174,6 +180,10 @@ packages:
     resolution: {integrity: sha512-Q/N6JNWvIvPnLDvjlE1OUBLPQHH6l3CltCEsHIujp45zQUSSh8K+gHnaEX45yAT1nyngnINhvWtzN+Nb9D8RAQ==}
     engines: {node: '>=6.9.0'}
 
+  '@babel/runtime@7.29.2':
+    resolution: {integrity: sha512-JiDShH45zKHWyGe4ZNVRrCjBz8Nh9TMmZG1kh4QTK8hCBTWBi8Da+i7s1fJw7/lYpM4ccepSNfqzZ/QvABBi5g==}
+    engines: {node: '>=6.9.0'}
+
   '@borewit/text-codec@0.2.1':
     resolution: {integrity: sha512-k7vvKPbf7J2fZ5klGRD9AeKfUvojuZIQ3BT5u7Jfv+puwXkUBUT5PVyMDfJZpy30CBDXGMgw7fguK/lpOMBvgw==}
 
@@ -885,6 +895,12 @@ packages:
     cpu: [x64]
     os: [win32]
 
+  '@romcal/calendar.general-roman@3.0.0-dev.125':
+    resolution: {integrity: sha512-6E4D9zfGqkz7NlJTv38v8++tZv234F1Z2jXlyzOithy92ZzZJhOMgUcmw0MOLUbn24lqz3477/VlFdLvRtzQBA==}
+    engines: {node: '>=18.0.0'}
+    peerDependencies:
+      romcal: 3.0.0-dev.125
+
   '@sec-ant/readable-stream@0.4.1':
     resolution: {integrity: sha512-831qok9r2t8AlxLko40y2ebgSDhenenCatLVeW/uBtnHPyhHOvG0C7TvfgecV+wHzIm5KUICgzmVpWS+IMEAeg==}
 
@@ -1404,6 +1420,14 @@ packages:
     resolution: {integrity: sha512-vK9P5/iUfdl95AI+JVyUuIcVtd4ofvtrOr3HNtM2yxC9bnMbEdp3x01OhQNnjb8IJYi38VlTE3mBXwcfvywuSw==}
     engines: {node: '>= 14'}
 
+  i18next@25.10.10:
+    resolution: {integrity: sha512-cqUW2Z3EkRx7NqSyywjkgCLK7KLCL6IFVFcONG7nVYIJ3ekZ1/N5jUsihHV6Bq37NfhgtczxJcxduELtjTwkuQ==}
+    peerDependencies:
+      typescript: ^5 || ^6
+    peerDependenciesMeta:
+      typescript:
+        optional: true
+
   iconv-lite@0.6.3:
     resolution: {integrity: sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==}
     engines: {node: '>=0.10.0'}
@@ -1757,6 +1781,10 @@ packages:
     engines: {node: '>=18.0.0', npm: '>=8.0.0'}
     hasBin: true
 
+  romcal@3.0.0-dev.125:
+    resolution: {integrity: sha512-mMNojZW+6asQ3XCxsFZaiGIsnXoX+MEmnCmf7OLMT3CZ6/ltMZUQOCNB79qZYcNVLAjbNA+YFW9zU9OjumD6vw==}
+    engines: {node: '>=18.0.0'}
+
   sade@1.8.1:
     resolution: {integrity: sha512-xal3CZX1Xlo/k4ApwCFrHVACi9fBqJ7V+mwhBsuf/1IOKbBy098Fex+Wa/5QMubw09pSZ/u8EY8PWgevJsXp1A==}
     engines: {node: '>=6'}
@@ -2158,6 +2186,8 @@ snapshots:
 
   '@babel/runtime@7.28.4': {}
 
+  '@babel/runtime@7.29.2': {}
+
   '@borewit/text-codec@0.2.1': {}
 
   '@csstools/color-helpers@5.1.0': {}
@@ -2651,6 +2681,10 @@ snapshots:
   '@rollup/rollup-win32-x64-msvc@4.60.1':
     optional: true
 
+  '@romcal/calendar.general-roman@3.0.0-dev.125(romcal@3.0.0-dev.125(typescript@6.0.2))':
+    dependencies:
+      romcal: 3.0.0-dev.125(typescript@6.0.2)
+
   '@sec-ant/readable-stream@0.4.1': {}
 
   '@standard-schema/spec@1.0.0': {}
@@ -3145,6 +3179,12 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  i18next@25.10.10(typescript@6.0.2):
+    dependencies:
+      '@babel/runtime': 7.29.2
+    optionalDependencies:
+      typescript: 6.0.2
+
   iconv-lite@0.6.3:
     dependencies:
       safer-buffer: 2.1.2
@@ -3503,6 +3543,12 @@ snapshots:
       '@rollup/rollup-win32-x64-msvc': 4.60.1
       fsevents: 2.3.3
 
+  romcal@3.0.0-dev.125(typescript@6.0.2):
+    dependencies:
+      i18next: 25.10.10(typescript@6.0.2)
+    transitivePeerDependencies:
+      - typescript
+
   sade@1.8.1:
     dependencies:
       mri: 1.2.0

src/params/calendarLang.ts

@@ -0,0 +1,5 @@
+import type { ParamMatcher } from '@sveltejs/kit';
+
+export const match: ParamMatcher = (param) => {
+	return param === 'calendar' || param === 'kalender' || param === 'calendarium';
+};

src/routes/[faithLang=faithLang]/+layout.svelte

@@ -12,6 +12,7 @@ const isLatin = $derived(data.lang === 'la');
 const eastertide = isEastertide();
 const prayersHref = $derived(isLatin ? '/fides/orationes' : `/${data.faithLang}/${isEnglish ? 'prayers' : 'gebete'}`);
 const rosaryHref = $derived(`/${data.faithLang}/${isLatin ? 'rosarium' : isEnglish ? 'rosary' : 'rosenkranz'}`);
+const calendarHref = $derived(`/${data.faithLang}/${isLatin ? 'calendarium' : isEnglish ? 'calendar' : 'kalender'}`);
 const angelusHref = $derived(eastertide
 	? `${prayersHref}/regina-caeli`
 	: `${prayersHref}/angelus`);
@@ -20,7 +21,8 @@ const angelusLabel = $derived(eastertide ? 'Regína Cæli' : 'Angelus');
 const labels = $derived({
 	prayers: isLatin ? 'Orationes' : isEnglish ? 'Prayers' : 'Gebete',
 	rosary: isLatin ? 'Rosarium' : isEnglish ? 'Rosary' : 'Rosenkranz',
-	catechesis: isEnglish ? 'Catechesis' : 'Katechese'
+	catechesis: isEnglish ? 'Catechesis' : 'Katechese',
+	calendar: isLatin ? 'Calendarium' : isEnglish ? 'Calendar' : 'Kalender'
 });
 
 const typedLang = $derived(/** @type {'de' | 'en'} */ (data.lang));
@@ -47,6 +49,7 @@ const prayersActive = $derived(isActive(prayersHref) && !isActive(angelusHref));
 			<li style="--active-fill: var(--nord14)"><a href={angelusHref} class:active={isActive(angelusHref)} title={angelusLabel}><svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="6 -274 564 548" fill="currentColor"><path d="M392-162c-4-10-9-18-15-26 5-4 7-8 7-12 0-18-43-32-96-32s-96 14-96 32c0 4 3 8 7 12-6 8-11 16-15 26-15-11-24-24-24-38 0-35 57-64 128-64s128 29 128 64c0 14-9 27-24 38zm-104-22c35 0 64 29 64 64s-29 64-64 64-64-29-64-64 29-64 64-64zM82 159c3-22-3-48-20-64C34 68 16 30 16-12v-64c0-42 34-76 76-76 23 0 44 10 59 27l65 78c-21 16-37 40-43 67l-43 195c-4 17-2 34 5 49h-21c-26 0-46-24-42-50l10-55zm364 56L403 20c-6-27-21-51-42-67l64-77c15-18 36-28 59-28 42 0 76 34 76 76v64c0 42-18 80-46 107-17 16-23 42-20 64l10 56c4 26-16 49-42 49h-20c6-15 8-32 4-49zM220 31c7-32 35-55 68-55s61 23 68 55l43 194c5 20-11 39-31 39H208c-21 0-36-19-31-39l43-194z"/></svg><span class="nav-label">{angelusLabel}</span></a></li>
 		{/if}
 		<li style="--active-fill: var(--nord13)"><a href="/{data.faithLang}/katechese" class:active={isActive(`/${data.faithLang}/katechese`)} title={labels.catechesis}><svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 7v14"/><path d="M16 12h2"/><path d="M16 8h2"/><path d="M3 18a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1h5a4 4 0 0 1 4 4 4 4 0 0 1 4-4h5a1 1 0 0 1 1 1v13a1 1 0 0 1-1 1h-6a3 3 0 0 0-3 3 3 3 0 0 0-3-3z"/><path d="M6 12h2"/><path d="M6 8h2"/></svg><span class="nav-label">{labels.catechesis}</span></a></li>
+		<li style="--active-fill: var(--nord15)"><a href={calendarHref} class:active={isActive(calendarHref)} title={labels.calendar}><svg class="nav-icon" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M8 2v4"/><path d="M16 2v4"/><rect width="18" height="18" x="3" y="4" rx="2"/><path d="M3 10h18"/><path d="M8 14h.01"/><path d="M12 14h.01"/><path d="M16 14h.01"/><path d="M8 18h.01"/><path d="M12 18h.01"/><path d="M16 18h.01"/></svg><span class="nav-label">{labels.calendar}</span></a></li>
 		</ul>
 	{/snippet}
 

src/routes/[faithLang=faithLang]/[calendar=calendarLang]/+page.server.ts

@@ -0,0 +1,173 @@
+import { error, redirect } from '@sveltejs/kit';
+import type { PageServerLoad } from './$types';
+import { Romcal } from 'romcal';
+import {
+	GeneralRoman_De,
+	GeneralRoman_En,
+	GeneralRoman_La
+} from '@romcal/calendar.general-roman';
+import { expectedSlug, isValidRite, type CalendarLang, type Rite } from './calendarI18n';
+
+export interface CalendarDay {
+	iso: string;
+	id: string;
+	name: string;
+	rankName: string;
+	rank: string;
+	seasonNames: string[];
+	colorNames: string[];
+	colorKeys: string[];
+	psalterWeek: string | null;
+	sundayCycle: string | null;
+}
+
+const localeBundles = {
+	en: GeneralRoman_En,
+	de: GeneralRoman_De,
+	la: GeneralRoman_La
+};
+
+// Cache: lang -> Romcal instance
+const romcalByLang = new Map<CalendarLang, Romcal>();
+function getRomcal(lang: CalendarLang): Romcal {
+	let r = romcalByLang.get(lang);
+	if (r) return r;
+	r = new Romcal({ localizedCalendar: localeBundles[lang] });
+	romcalByLang.set(lang, r);
+	return r;
+}
+
+// Cache: lang|year -> Map<iso, CalendarDay>
+const yearCache = new Map<string, Map<string, CalendarDay>>();
+
+async function getYear(lang: CalendarLang, year: number): Promise<Map<string, CalendarDay>> {
+	const cacheKey = `${lang}|${year}`;
+	const cached = yearCache.get(cacheKey);
+	if (cached) return cached;
+
+	const r = getRomcal(lang);
+	const raw = await r.generateCalendar(year);
+	const map = new Map<string, CalendarDay>();
+	for (const [iso, entries] of Object.entries(raw)) {
+		const principal = entries[0];
+		if (!principal) continue;
+		map.set(iso, {
+			iso,
+			id: principal.id,
+			name: principal.name,
+			rankName: principal.rankName,
+			rank: principal.rank,
+			seasonNames: [...principal.seasonNames],
+			colorNames: [...principal.colorNames],
+			colorKeys: [...principal.colors],
+			psalterWeek: principal.cycles?.psalterWeek ?? null,
+			sundayCycle: principal.cycles?.sundayCycle ?? null
+		});
+	}
+	yearCache.set(cacheKey, map);
+	return map;
+}
+
+function isoFor(year: number, month: number, day: number): string {
+	const mm = String(month + 1).padStart(2, '0');
+	const dd = String(day).padStart(2, '0');
+	return `${year}-${mm}-${dd}`;
+}
+
+export const load: PageServerLoad = async ({ params, url, locals }) => {
+	const slug = expectedSlug(params.faithLang);
+	if (slug === null) throw error(404, 'Not found');
+	if (params.calendar !== slug) {
+		throw redirect(307, `/${params.faithLang}/${slug}`);
+	}
+
+	const lang: CalendarLang =
+		params.faithLang === 'faith' ? 'en' : params.faithLang === 'fides' ? 'la' : 'de';
+
+	const today = new Date();
+	const riteParam = url.searchParams.get('rite');
+	const rite: Rite = isValidRite(riteParam) ? riteParam : '1969';
+
+	// 1962 rite is WIP — skip data generation
+	if (rite === '1962') {
+		return {
+			rite,
+			wip: true,
+			year: today.getFullYear(),
+			month: today.getMonth(),
+			monthDays: [],
+			today: null,
+			todayIso: today.toISOString().slice(0, 10),
+			selected: null,
+			selectedIso: '',
+			session: locals.session ?? (await locals.auth())
+		};
+	}
+
+	const yParam = url.searchParams.get('y');
+	const mParam = url.searchParams.get('m');
+	const selectedDateParam = url.searchParams.get('d');
+
+	const y = yParam !== null ? Number(yParam) : NaN;
+	const m = mParam !== null ? Number(mParam) : NaN;
+
+	const year = Number.isFinite(y) && y >= 1969 && y <= 2100 ? y : today.getFullYear();
+	const month = Number.isFinite(m) && m >= 0 && m <= 11 ? m : today.getMonth();
+
+	const yearMap = await getYear(lang, year);
+	const daysInMonth = new Date(year, month + 1, 0).getDate();
+	const monthDays: CalendarDay[] = [];
+	for (let d = 1; d <= daysInMonth; d++) {
+		const iso = isoFor(year, month, d);
+		const entry = yearMap.get(iso);
+		if (entry) monthDays.push(entry);
+		else {
+			monthDays.push({
+				iso,
+				id: '',
+				name: '',
+				rankName: '',
+				rank: 'WEEKDAY',
+				seasonNames: [],
+				colorNames: [],
+				colorKeys: ['GREEN'],
+				psalterWeek: null,
+				sundayCycle: null
+			});
+		}
+	}
+
+	const todayIso = today.toISOString().slice(0, 10);
+	const todayYearMap = await getYear(lang, today.getFullYear());
+	const todayEntry = todayYearMap.get(todayIso) ?? null;
+
+	let selectedIso: string;
+	if (selectedDateParam && /^\d{4}-\d{2}-\d{2}$/.test(selectedDateParam)) {
+		selectedIso = selectedDateParam;
+	} else if (todayEntry && today.getFullYear() === year && today.getMonth() === month) {
+		selectedIso = todayIso;
+	} else {
+		selectedIso = monthDays[0].iso;
+	}
+	const selectedYear = Number(selectedIso.slice(0, 4));
+	const selectedYearMap =
+		selectedYear === year
+			? yearMap
+			: selectedYear === today.getFullYear()
+				? todayYearMap
+				: await getYear(lang, selectedYear);
+	const selectedEntry = selectedYearMap.get(selectedIso) ?? monthDays[0];
+
+	return {
+		rite,
+		wip: false,
+		year,
+		month,
+		monthDays,
+		today: todayEntry,
+		todayIso,
+		selected: selectedEntry,
+		selectedIso,
+		session: locals.session ?? (await locals.auth())
+	};
+};

src/routes/[faithLang=faithLang]/[calendar=calendarLang]/+page.svelte

@@ -0,0 +1,664 @@
+<script lang="ts">
+	import type { PageData } from './$types';
+	import {
+		getMonthName,
+		getWeekdayShort,
+		formatLongDate,
+		hexFor,
+		rankEmphasis,
+		humanizePsalterWeek,
+		humanizeSundayCycle,
+		t,
+		type CalendarLang
+	} from './calendarI18n';
+
+	let { data }: { data: PageData } = $props();
+
+	const lang = $derived(data.lang as CalendarLang);
+
+	const year = $derived(data.year);
+	const month = $derived(data.month);
+	const monthDays = $derived(data.monthDays);
+	const today = $derived(data.today);
+	const todayIso = $derived(data.todayIso);
+	const selected = $derived(data.selected);
+	const selectedIso = $derived(data.selectedIso);
+
+	const monthTitle = $derived(`${getMonthName(month, lang)} ${year}`);
+
+	const prevMonth = $derived(month === 0 ? { y: year - 1, m: 11 } : { y: year, m: month - 1 });
+	const nextMonth = $derived(month === 11 ? { y: year + 1, m: 0 } : { y: year, m: month + 1 });
+
+	const weekdayLabels = $derived(
+		[1, 2, 3, 4, 5, 6, 0].map((w) => getWeekdayShort(w, lang))
+	);
+
+	const leadingBlanks = $derived.by(() => {
+		const firstDow = new Date(year, month, 1).getDay();
+		return (firstDow + 6) % 7;
+	});
+
+	function dayHref(iso: string) {
+		return `?y=${year}&m=${month}&d=${iso}`;
+	}
+
+	function monthHref(y: number, m: number) {
+		return `?y=${y}&m=${m}`;
+	}
+
+	const todayHref = $derived.by(() => {
+		const now = new Date();
+		return `?y=${now.getFullYear()}&m=${now.getMonth()}&d=${todayIso}`;
+	});
+
+	const pageTitle = $derived(t('calendar', lang));
+
+	const rite = $derived(data.rite);
+	const wip = $derived(data.wip);
+	const riteSubtitle = $derived(t(rite === '1962' ? 'rite1962Long' : 'rite1969Long', lang));
+
+	function firstOr(arr: string[], fallback = ''): string {
+		return arr && arr.length ? arr[0] : fallback;
+	}
+
+	function riteHref(r: '1969' | '1962') {
+		return r === '1969' ? '?' : '?rite=1962';
+	}
+</script>
+
+<svelte:head>
+	<title>{pageTitle} — Bocken</title>
+	<meta name="description" content={pageTitle} />
+</svelte:head>
+
+<main class="cal-wrap">
+	<header class="cal-head">
+		<h1>{pageTitle}</h1>
+		<p class="rite-subtitle">{riteSubtitle}</p>
+		<div class="rite-toggle" role="tablist" aria-label="Rite">
+			<a
+				role="tab"
+				aria-selected={rite === '1969'}
+				class="rite-pill"
+				class:active={rite === '1969'}
+				href={riteHref('1969')}
+			>
+				1969
+			</a>
+			<a
+				role="tab"
+				aria-selected={rite === '1962'}
+				class="rite-pill"
+				class:active={rite === '1962'}
+				href={riteHref('1962')}
+			>
+				1962
+			</a>
+		</div>
+	</header>
+
+	{#if wip}
+		<section class="wip">
+			<svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 8v4"/><path d="M12 16h.01"/><circle cx="12" cy="12" r="10"/></svg>
+			<h2>{t('wipTitle', lang)}</h2>
+			<p>{t('wipBody', lang)}</p>
+		</section>
+	{:else}
+	{#if today}
+		{@const todayHex = hexFor(today.colorKeys)}
+		<section class="today-hero" style="--accent: {todayHex}">
+			<div class="today-meta">
+				<span class="today-label">{t('today', lang)}</span>
+				<span class="today-date">{formatLongDate(today.iso, lang)}</span>
+			</div>
+			<h2 class="today-name">{today.name}</h2>
+			<div class="today-tags">
+				{#if today.seasonNames.length}
+					<span class="tag tag-season">{firstOr(today.seasonNames)}</span>
+				{/if}
+				{#if today.rankName}
+					<span class="tag tag-rank">{today.rankName}</span>
+				{/if}
+				{#if today.colorNames.length}
+					<span class="tag tag-color">
+						<span class="color-swatch" style="background: {todayHex}"></span>
+						{firstOr(today.colorNames)}
+					</span>
+				{/if}
+				{#if today.psalterWeek}
+					<span class="tag">{t('psalterWeek', lang)}: {humanizePsalterWeek(today.psalterWeek, lang)}</span>
+				{/if}
+				{#if today.sundayCycle}
+					<span class="tag">{t('cycle', lang)}: {humanizeSundayCycle(today.sundayCycle)}</span>
+				{/if}
+			</div>
+		</section>
+	{/if}
+
+	<nav class="month-nav" aria-label={monthTitle}>
+		<a
+			class="nav-btn"
+			href={monthHref(prevMonth.y, prevMonth.m)}
+			aria-label={t('prev', lang)}
+			data-sveltekit-noscroll
+		>
+			<svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="15 18 9 12 15 6"/></svg>
+		</a>
+		<h2 class="month-title">{monthTitle}</h2>
+		<a
+			class="nav-btn"
+			href={monthHref(nextMonth.y, nextMonth.m)}
+			aria-label={t('next', lang)}
+			data-sveltekit-noscroll
+		>
+			<svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="9 18 15 12 9 6"/></svg>
+		</a>
+	</nav>
+
+	<div class="today-jump-row">
+		<a class="jump-btn" href={todayHref} data-sveltekit-noscroll>
+			<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg>
+			{t('jumpToToday', lang)}
+		</a>
+	</div>
+
+	<div class="grid">
+		<div class="grid-header" role="row">
+			{#each weekdayLabels as wd (wd)}
+				<div class="wd-cell" role="columnheader">{wd}</div>
+			{/each}
+		</div>
+
+		<div class="grid-body" role="grid">
+			{#each Array.from({ length: leadingBlanks }, (_, i) => i) as i (i)}
+				<div class="day-cell blank" aria-hidden="true"></div>
+			{/each}
+
+			{#each monthDays as day (day.iso)}
+				{@const isToday = day.iso === todayIso}
+				{@const isSelected = day.iso === selectedIso}
+				{@const rank = rankEmphasis(day.rank)}
+				{@const dayHex = hexFor(day.colorKeys)}
+				<a
+					class="day-cell"
+					class:today={isToday}
+					class:selected={isSelected}
+					class:rank-high={rank === 3}
+					class:rank-mid={rank === 2}
+					class:rank-low={rank === 1}
+					href={dayHref(day.iso)}
+					style="--day-color: {dayHex}"
+					data-sveltekit-noscroll
+					data-sveltekit-replacestate
+				>
+					<span class="day-num">{Number(day.iso.slice(8, 10))}</span>
+					<span class="day-color-dot" aria-hidden="true"></span>
+					{#if day.name}
+						<span class="day-name" title={day.name}>{day.name}</span>
+					{/if}
+				</a>
+			{/each}
+		</div>
+	</div>
+
+	{#if selected}
+		{@const selectedHex = hexFor(selected.colorKeys)}
+		<section class="detail" style="--accent: {selectedHex}" aria-live="polite">
+			<div class="detail-head">
+				<span class="detail-date">{formatLongDate(selected.iso, lang)}</span>
+				{#if selected.rankName}
+					<span class="tag tag-rank">{selected.rankName}</span>
+				{/if}
+			</div>
+			<h3 class="detail-name">{selected.name}</h3>
+			<div class="detail-tags">
+				{#if selected.seasonNames.length}
+					<span class="tag tag-season">{firstOr(selected.seasonNames)}</span>
+				{/if}
+				{#if selected.colorNames.length}
+					<span class="tag tag-color">
+						<span class="color-swatch" style="background: {selectedHex}"></span>
+						{firstOr(selected.colorNames)}
+					</span>
+				{/if}
+				{#if selected.psalterWeek}
+					<span class="tag">{t('psalterWeek', lang)}: {humanizePsalterWeek(selected.psalterWeek, lang)}</span>
+				{/if}
+				{#if selected.sundayCycle}
+					<span class="tag">{t('cycle', lang)}: {humanizeSundayCycle(selected.sundayCycle)}</span>
+				{/if}
+			</div>
+		</section>
+	{/if}
+	{/if}
+</main>
+
+<style>
+	.cal-wrap {
+		max-width: 1000px;
+		margin-inline: auto;
+		padding: 1rem 1rem 4rem;
+	}
+
+	.cal-head {
+		display: flex;
+		flex-direction: column;
+		align-items: center;
+		gap: 0.5rem;
+		margin: 0.5rem 0 1.5rem;
+	}
+	.cal-head h1 {
+		text-align: center;
+		font-size: 2.4rem;
+		margin: 0;
+		color: var(--color-text-primary);
+	}
+	.rite-subtitle {
+		margin: 0;
+		font-size: var(--text-sm);
+		color: var(--color-text-secondary);
+		text-align: center;
+		font-style: italic;
+	}
+
+	/* --- Rite toggle (segmented pill) --- */
+	.rite-toggle {
+		display: inline-flex;
+		gap: 0.25rem;
+		padding: 0.25rem;
+		background: var(--color-bg-tertiary);
+		border-radius: var(--radius-pill);
+		box-shadow: inset 0 0 0 1px var(--color-border);
+		margin-top: 0.25rem;
+	}
+	.rite-pill {
+		display: inline-flex;
+		align-items: center;
+		justify-content: center;
+		min-width: 4.5rem;
+		padding: 0.4rem 1rem;
+		border-radius: var(--radius-pill);
+		font-size: var(--text-sm);
+		font-weight: 600;
+		letter-spacing: 0.03em;
+		color: var(--color-text-secondary);
+		text-decoration: none;
+		transition: color var(--transition-fast), background var(--transition-fast),
+			box-shadow var(--transition-fast);
+	}
+	.rite-pill:hover:not(.active) {
+		color: var(--color-text-primary);
+		background: var(--color-bg-elevated);
+	}
+	.rite-pill.active {
+		background: var(--color-primary);
+		color: var(--color-text-on-primary);
+		box-shadow: var(--shadow-sm);
+	}
+	.rite-pill:focus-visible {
+		outline: 2px solid var(--color-primary);
+		outline-offset: 2px;
+	}
+
+	/* --- WIP placeholder --- */
+	.wip {
+		display: flex;
+		flex-direction: column;
+		align-items: center;
+		text-align: center;
+		gap: 0.75rem;
+		padding: 3rem 1.5rem;
+		background: var(--color-surface);
+		border-radius: var(--radius-card);
+		box-shadow: var(--shadow-md);
+		margin-bottom: 1.5rem;
+		color: var(--color-text-secondary);
+		border: 1px dashed var(--color-border);
+	}
+	.wip svg {
+		color: var(--color-primary);
+		opacity: 0.75;
+	}
+	.wip h2 {
+		margin: 0;
+		font-size: 1.3rem;
+		color: var(--color-text-primary);
+	}
+	.wip p {
+		margin: 0;
+		max-width: 36ch;
+		line-height: 1.5;
+	}
+
+	/* --- Today hero --- */
+	.today-hero {
+		position: relative;
+		background: var(--color-surface);
+		border-radius: var(--radius-card);
+		padding: 1.5rem 1.75rem;
+		margin-bottom: 1.5rem;
+		box-shadow: var(--shadow-md);
+		border-left: 6px solid var(--accent);
+		overflow: hidden;
+	}
+	.today-hero::before {
+		content: '';
+		position: absolute;
+		inset: 0;
+		background: linear-gradient(135deg, var(--accent) 0%, transparent 40%);
+		opacity: 0.08;
+		pointer-events: none;
+	}
+	.today-meta {
+		display: flex;
+		align-items: baseline;
+		gap: 1rem;
+		flex-wrap: wrap;
+		margin-bottom: 0.5rem;
+	}
+	.today-label {
+		font-size: var(--text-sm);
+		font-weight: 700;
+		color: var(--accent);
+		letter-spacing: 0.1em;
+		text-transform: uppercase;
+	}
+	.today-date {
+		font-size: var(--text-sm);
+		color: var(--color-text-secondary);
+	}
+	.today-name {
+		font-size: clamp(1.3rem, 3vw, 1.8rem);
+		margin: 0 0 0.75rem;
+		color: var(--color-text-primary);
+		line-height: 1.2;
+	}
+	.today-tags {
+		display: flex;
+		flex-wrap: wrap;
+		gap: 0.5rem;
+	}
+
+	.tag {
+		display: inline-flex;
+		align-items: center;
+		gap: 0.4rem;
+		padding: 0.25rem 0.7rem;
+		background: var(--color-bg-tertiary);
+		color: var(--color-text-secondary);
+		border-radius: var(--radius-pill);
+		font-size: var(--text-sm);
+		font-weight: 500;
+	}
+	.tag-season {
+		background: var(--color-bg-elevated);
+		color: var(--color-text-primary);
+	}
+	.tag-rank {
+		background: var(--color-primary);
+		color: var(--color-text-on-primary);
+	}
+	.color-swatch {
+		width: 12px;
+		height: 12px;
+		border-radius: 50%;
+		border: 1px solid var(--color-border);
+		display: inline-block;
+	}
+
+	/* --- Month nav --- */
+	.month-nav {
+		display: flex;
+		align-items: center;
+		justify-content: space-between;
+		gap: 1rem;
+		margin-bottom: 0.5rem;
+	}
+	.month-title {
+		font-size: 1.5rem;
+		margin: 0;
+		color: var(--color-text-primary);
+		text-align: center;
+		flex: 1;
+	}
+	.nav-btn {
+		display: inline-flex;
+		align-items: center;
+		justify-content: center;
+		width: 44px;
+		height: 44px;
+		border-radius: 50%;
+		background: var(--color-surface);
+		color: var(--color-text-primary);
+		box-shadow: var(--shadow-sm);
+		transition: transform var(--transition-fast), box-shadow var(--transition-normal),
+			background var(--transition-normal);
+	}
+	.nav-btn:hover {
+		transform: scale(1.05);
+		background: var(--color-bg-elevated);
+		box-shadow: var(--shadow-hover);
+	}
+
+	.today-jump-row {
+		display: flex;
+		justify-content: center;
+		margin-bottom: 1rem;
+	}
+	.jump-btn {
+		display: inline-flex;
+		align-items: center;
+		gap: 0.4rem;
+		padding: 0.4rem 0.9rem;
+		background: var(--color-bg-tertiary);
+		color: var(--color-text-secondary);
+		border-radius: var(--radius-pill);
+		font-size: var(--text-sm);
+		transition: background var(--transition-fast), transform var(--transition-fast);
+	}
+	.jump-btn:hover {
+		background: var(--color-bg-elevated);
+		color: var(--color-text-primary);
+		transform: scale(1.03);
+	}
+
+	/* --- Grid --- */
+	.grid {
+		background: var(--color-surface);
+		border-radius: var(--radius-card);
+		overflow: hidden;
+		box-shadow: var(--shadow-md);
+	}
+	.grid-header {
+		display: grid;
+		grid-template-columns: repeat(7, 1fr);
+		background: var(--color-bg-elevated);
+	}
+	.wd-cell {
+		padding: 0.5rem;
+		text-align: center;
+		font-size: var(--text-sm);
+		font-weight: 600;
+		color: var(--color-text-secondary);
+		text-transform: uppercase;
+		letter-spacing: 0.05em;
+	}
+	.grid-body {
+		display: grid;
+		grid-template-columns: repeat(7, 1fr);
+		gap: 1px;
+		background: var(--color-border);
+	}
+
+	.day-cell {
+		position: relative;
+		display: flex;
+		flex-direction: column;
+		gap: 0.15rem;
+		min-height: 5.5rem;
+		padding: 0.4rem 0.45rem;
+		background: var(--color-surface);
+		color: var(--color-text-primary);
+		text-decoration: none;
+		transition: background var(--transition-fast);
+		overflow: hidden;
+	}
+	.day-cell.blank {
+		background: var(--color-bg-secondary);
+	}
+	.day-cell:not(.blank):hover {
+		background: var(--color-bg-elevated);
+	}
+	.day-num {
+		font-size: 0.95rem;
+		font-weight: 600;
+		line-height: 1;
+		color: var(--color-text-secondary);
+	}
+	.day-color-dot {
+		position: absolute;
+		top: 0.5rem;
+		right: 0.5rem;
+		width: 8px;
+		height: 8px;
+		border-radius: 50%;
+		background: var(--day-color);
+		box-shadow: 0 0 0 1px var(--color-border);
+	}
+	.day-name {
+		font-size: 0.72rem;
+		line-height: 1.15;
+		color: var(--color-text-tertiary);
+		overflow: hidden;
+		display: -webkit-box;
+		-webkit-line-clamp: 3;
+		-webkit-box-orient: vertical;
+	}
+
+	.day-cell.rank-high .day-name {
+		font-weight: 700;
+		color: var(--color-text-primary);
+	}
+	.day-cell.rank-mid .day-name {
+		font-weight: 600;
+		color: var(--color-text-primary);
+	}
+	.day-cell.rank-low .day-name {
+		color: var(--color-text-secondary);
+	}
+
+	.day-cell.today {
+		background: var(--color-bg-elevated);
+	}
+	.day-cell.today .day-num {
+		color: var(--color-primary);
+		font-weight: 800;
+	}
+	.day-cell.today .day-num::before {
+		content: '';
+		display: inline-block;
+		width: 22px;
+		height: 22px;
+		border-radius: 50%;
+		background: var(--color-primary);
+		vertical-align: middle;
+		position: absolute;
+		top: 0.3rem;
+		left: 0.3rem;
+		z-index: 0;
+		opacity: 0.15;
+	}
+
+	.day-cell.selected {
+		outline: 2px solid var(--color-primary);
+		outline-offset: -2px;
+		z-index: 1;
+	}
+
+	/* --- Detail panel --- */
+	.detail {
+		background: var(--color-surface);
+		border-radius: var(--radius-card);
+		padding: 1.25rem 1.5rem;
+		margin-top: 1.5rem;
+		box-shadow: var(--shadow-md);
+		border-left: 4px solid var(--accent);
+	}
+	.detail-head {
+		display: flex;
+		align-items: center;
+		gap: 0.75rem;
+		flex-wrap: wrap;
+		margin-bottom: 0.5rem;
+	}
+	.detail-date {
+		font-size: var(--text-sm);
+		color: var(--color-text-secondary);
+	}
+	.detail-name {
+		font-size: 1.3rem;
+		margin: 0 0 0.75rem;
+		color: var(--color-text-primary);
+		line-height: 1.25;
+	}
+	.detail-tags {
+		display: flex;
+		flex-wrap: wrap;
+		gap: 0.5rem;
+	}
+
+	/* --- Responsive --- */
+	@media (max-width: 560px) {
+		.cal-wrap {
+			padding: 0.5rem 0.5rem 3rem;
+		}
+		.cal-head h1 {
+			font-size: 1.8rem;
+		}
+		.today-hero {
+			padding: 1.1rem 1.1rem;
+		}
+		.month-title {
+			font-size: 1.2rem;
+		}
+		.nav-btn {
+			width: 38px;
+			height: 38px;
+		}
+		.day-cell {
+			min-height: 4.2rem;
+			padding: 0.3rem 0.3rem;
+		}
+		.day-num {
+			font-size: 0.85rem;
+		}
+		.day-name {
+			font-size: 0.6rem;
+			-webkit-line-clamp: 2;
+		}
+		.day-color-dot {
+			width: 6px;
+			height: 6px;
+			top: 0.35rem;
+			right: 0.35rem;
+		}
+		.wd-cell {
+			font-size: 0.7rem;
+			padding: 0.35rem 0.2rem;
+		}
+	}
+
+	@media (max-width: 410px) {
+		.day-name {
+			display: none;
+		}
+		.day-cell {
+			min-height: 3.2rem;
+			align-items: center;
+			justify-content: center;
+		}
+		.day-num {
+			font-size: 0.9rem;
+		}
+	}
+</style>

src/routes/[faithLang=faithLang]/[calendar=calendarLang]/calendarI18n.ts

@@ -0,0 +1,124 @@
+export type CalendarLang = 'en' | 'de' | 'la';
+
+const langPairs = {
+	faith: { lang: 'en' as const, slug: 'calendar' },
+	glaube: { lang: 'de' as const, slug: 'kalender' },
+	fides: { lang: 'la' as const, slug: 'calendarium' }
+};
+
+export function expectedSlug(faithLang: string): string | null {
+	return langPairs[faithLang as keyof typeof langPairs]?.slug ?? null;
+}
+
+const intlLocale: Record<CalendarLang, string> = { en: 'en-US', de: 'de-DE', la: 'la' };
+
+export function getMonthName(month: number, lang: CalendarLang): string {
+	try {
+		return new Intl.DateTimeFormat(intlLocale[lang], { month: 'long' }).format(new Date(2000, month, 1));
+	} catch {
+		return new Intl.DateTimeFormat('en-US', { month: 'long' }).format(new Date(2000, month, 1));
+	}
+}
+
+export function getWeekdayShort(weekday: number, lang: CalendarLang): string {
+	const d = new Date(2000, 0, 2 + weekday);
+	try {
+		return new Intl.DateTimeFormat(intlLocale[lang], { weekday: 'short' }).format(d);
+	} catch {
+		return new Intl.DateTimeFormat('en-US', { weekday: 'short' }).format(d);
+	}
+}
+
+export function formatLongDate(iso: string, lang: CalendarLang): string {
+	const d = new Date(iso);
+	try {
+		return new Intl.DateTimeFormat(intlLocale[lang], {
+			weekday: 'long',
+			year: 'numeric',
+			month: 'long',
+			day: 'numeric'
+		}).format(d);
+	} catch {
+		return d.toDateString();
+	}
+}
+
+// Hex for each liturgical color key returned by romcal
+export const colorHex: Record<string, string> = {
+	WHITE: '#F5F5F0',
+	RED: '#C0392B',
+	GREEN: '#27AE60',
+	PURPLE: '#7D4E9C',
+	ROSE: '#E8A4B8',
+	BLACK: '#2E3440',
+	GOLD: '#D4A64A'
+};
+
+export function hexFor(colorKeys: string[]): string {
+	const first = colorKeys[0];
+	return colorHex[first] ?? '#27AE60';
+}
+
+// Rank emphasis for visual weighting of cells
+export function rankEmphasis(rank: string): number {
+	if (rank === 'SOLEMNITY') return 3;
+	if (rank === 'FEAST' || rank === 'SUNDAY' || rank === 'HOLY_DAY_OF_OBLIGATION') return 2;
+	if (rank === 'MEMORIAL') return 1;
+	return 0;
+}
+
+export function humanizePsalterWeek(raw: string | null, lang: CalendarLang): string | null {
+	if (!raw) return null;
+	// raw is e.g. "WEEK_1"
+	const m = raw.match(/^WEEK_(\d)$/);
+	if (!m) return raw;
+	const n = m[1];
+	const romans: Record<string, string> = { '1': 'I', '2': 'II', '3': 'III', '4': 'IV' };
+	return romans[n] ?? n;
+}
+
+export function humanizeSundayCycle(raw: string | null): string | null {
+	if (!raw) return null;
+	// e.g. "YEAR_A" → "A"
+	const m = raw.match(/^YEAR_([A-C])$/);
+	return m ? m[1] : raw;
+}
+
+export const ui = {
+	today: { en: 'Today', de: 'Heute', la: 'Hodie' },
+	calendar: { en: 'Liturgical Calendar', de: 'Liturgischer Kalender', la: 'Calendarium Liturgicum' },
+	jumpToToday: { en: 'Jump to today', de: 'Zu heute', la: 'Ad hodiernum' },
+	prev: { en: 'Previous month', de: 'Vorheriger Monat', la: 'Mensis praecedens' },
+	next: { en: 'Next month', de: 'Nächster Monat', la: 'Mensis sequens' },
+	psalterWeek: { en: 'Psalter week', de: 'Psalterwoche', la: 'Hebdomada psalterii' },
+	cycle: { en: 'Sunday cycle', de: 'Lesejahr', la: 'Cyclus dominicalis' },
+	rite1969Long: {
+		en: 'Roman Missal of 1969 (Ordinary Form)',
+		de: 'Römisches Messbuch 1969 (Ordentliche Form)',
+		la: 'Missale Romanum 1969 (Forma Ordinaria)'
+	},
+	rite1962Long: {
+		en: 'Roman Missal of 1962 (Extraordinary Form)',
+		de: 'Römisches Messbuch 1962 (Außerordentliche Form)',
+		la: 'Missale Romanum 1962 (Forma Extraordinaria)'
+	},
+	wipTitle: {
+		en: 'Work in progress',
+		de: 'In Arbeit',
+		la: 'In opere'
+	},
+	wipBody: {
+		en: 'The 1962 (Tridentine) calendar is not yet available. Stay tuned.',
+		de: 'Der tridentinische Kalender von 1962 ist noch nicht verfügbar. Bleib dran.',
+		la: 'Calendarium tridentinum anni 1962 nondum paratum est. Exspecta paulisper.'
+	}
+};
+
+export function t(key: keyof typeof ui, lang: CalendarLang): string {
+	return ui[key][lang] ?? ui[key].en;
+}
+
+export type Rite = '1969' | '1962';
+export function isValidRite(v: string | null): v is Rite {
+	return v === '1969' || v === '1962';
+}