Relocate Immaculate Heart of Mary off Aug 22 to Easter+69

Fixed Aug 22 collided outright with the Assumption's own octave-closing
day (both this project's blended calendar tracks are kept deliberately,
so one shouldn't permanently suppress the other). Moved IHM to the
Saturday after the Feast of the Sacred Heart -- its real diocesan date
from 1914 until Pius XII's 1944 fixed-date decree, and also the date the
1969 reform returned to.

Required real new mechanism, not just a data move: a new bespoke
calendar/index.ts override (applyImmaculateHeart, following the existing
applyMarianSaturday/applyChristTheKing precedent), a move from the
sanctoral saints store to the temporal-feasts store (different propers
lookup entirely), and a real bug fix in matins.ts's nocturnReadingIds,
which only ever picked up a *sanctoral* winner's own reading file.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VZSAgRi4QE4XRTqVto93zA

tests/calendar/august-sanctoral.test.ts

@@ -91,18 +91,17 @@ describe('August sanctoral pull (first pass)', () => {
     // Aug 22 is the Assumption's own octave day (In Octava Assumptionis),
     // Duplex, blocking Ss. Timothy/Hippolytus/Symphorian the same way --
     // it's also day 8 of the Assumption's own octave. Those three still
-    // aren't modeled -- but Aug 22 itself is also now the Immaculate
-    // Heart of the Blessed Virgin Mary's own fixed day (Duplex II
-    // Classis, added per the full-year sanctoral import), which wins
-    // outright under the ordinary-feria rule, with the octave still
-    // commemorated alongside her.
+    // aren't modeled. The Immaculate Heart of the Blessed Virgin Mary used
+    // to be fixed here too (Pius XII's 1944 decree), but was relocated
+    // (2026-08-22 user decision, see TODO.md) to Easter+69 -- the
+    // Saturday after the Feast of the Sacred Heart, its own real
+    // historical date on both sides of that fixed-date interlude -- so it
+    // no longer contests this date at all. With no sanctoral candidate
+    // left here, the day's own temporal identity wins outright and the
+    // octave is commemorated alongside it, same shape as St. Lawrence's
+    // own Aug 12 case just above.
     const assumptionOctaveDay = resolveDay('2025-08-22');
-    expect(assumptionOctaveDay.winner).toEqual({
-      kind: 'sanctoral',
-      id: 'immaculate-heart-of-mary',
-      name: 'The Immaculate Heart of the Blessed Virgin Mary',
-      rank: 'duplex-2-classis',
-    });
+    expect(assumptionOctaveDay.winner.kind).toBe('temporal');
     expect(assumptionOctaveDay.commemorations).toEqual([
       { kind: 'octave', id: 'assumption', name: 'The Assumption of the Blessed Virgin Mary' },
     ]);

tests/calendar/immaculate-heart-of-mary.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest';
+import { resolveDay } from '../../src/calendar';
+import { getDayCollect, getBenedictusAntiphon, getMagnificatAntiphon } from '../../src/hours/resolve-common';
+
+// Relocated off the fixed Aug 22 date (2026-08-22 user decision, see
+// TODO.md) -- that date collided outright with the Assumption's own
+// octave-closing day. Moved to Easter+69: the Saturday after the Feast of
+// the Sacred Heart (Easter+68, always a Friday), the feast's own real
+// diocesan date from 1914 until Pius XII's 1944 fixed-date decree, and
+// also the date the 1969 reform returned to.
+describe('Immaculate Heart of Mary (applyImmaculateHeart)', () => {
+  it('wins outright on Easter+69, with real content resolved via the temporal propers store', () => {
+    const day = resolveDay('2026-06-13'); // Easter 2026-04-05 + 69 days
+    expect(day.winner).toEqual({ kind: 'temporal', id: 'immaculate-heart-of-mary' });
+    expect(getDayCollect(day).status.en).toBe('verified');
+    expect(getBenedictusAntiphon(day).status.en).toBe('verified');
+    expect(getMagnificatAntiphon(day).status.en).toBe('verified');
+  });
+
+  it('correctly finds Easter+69 in a different year (early Easter)', () => {
+    const day = resolveDay('2027-06-05'); // Easter 2027-03-28 + 69 days
+    expect(day.winner).toEqual({ kind: 'temporal', id: 'immaculate-heart-of-mary' });
+  });
+
+  it('does not apply on the Saturday before or after', () => {
+    const before = resolveDay('2026-06-06');
+    const after = resolveDay('2026-06-20');
+    expect(before.winner).not.toEqual({ kind: 'temporal', id: 'immaculate-heart-of-mary' });
+    expect(after.winner).not.toEqual({ kind: 'temporal', id: 'immaculate-heart-of-mary' });
+  });
+
+  it('no longer wins or appears anywhere on Aug 22, which reverts to the Assumption octave alone', () => {
+    const day = resolveDay('2026-08-22');
+    expect(day.winner).not.toEqual(expect.objectContaining({ id: 'immaculate-heart-of-mary' }));
+    expect(day.commemorations).not.toContainEqual(expect.objectContaining({ id: 'immaculate-heart-of-mary' }));
+  });
+});