diff --git a/eform-client/playwright/e2e/plugins/time-planning-pn/b/dashboard-edit-multishift.spec.ts b/eform-client/playwright/e2e/plugins/time-planning-pn/b/dashboard-edit-multishift.spec.ts
index bc001ec6..0bd68259 100644
--- a/eform-client/playwright/e2e/plugins/time-planning-pn/b/dashboard-edit-multishift.spec.ts
+++ b/eform-client/playwright/e2e/plugins/time-planning-pn/b/dashboard-edit-multishift.spec.ts
@@ -370,22 +370,21 @@ test.describe('Dashboard — multi-shift (3-5) round-trip regression guard', ()
   });
 
   /**
-   * Phase 4 — second-precision DISPLAY: when a row's site has
-   * `useOneMinuteIntervals = true` AND the planning has a precise
-   * `start1StartedAt` stamp (e.g. 07:03:53), the plannings-table cell must
-   * render the stamp at HH:mm:ss instead of the legacy HH:mm.
+   * Plannings-table display contract: the cell always renders the actual
+   * shift stamp as `HH:mm`, even when `AssignedSite.UseOneMinuteIntervals`
+   * is on. Seconds are never shown regardless of the flag.
    *
-   * Server-side seeding `AssignedSite.UseOneMinuteIntervals = true` plus
-   * a planning with `Start1StartedAt = 2026-05-15 07:03:53` requires DB
-   * fixture work the CI playwright shard doesn't yet wire up (the tests
-   * here log in as admin and rely on the default seed). Captured here as
-   * a TODO so the assertion shape survives any future fixture work; the
-   * Phase 4 jest unit test on `formatStamp(...)` covers the contract for
-   * the merge-blocking path.
+   * Server-side seeding of `AssignedSite.UseOneMinuteIntervals = true`
+   * plus a planning row with `Start1StartedAt = 2026-05-15 07:03:53`
+   * requires DB fixture work the CI playwright shard doesn't yet wire up
+   * (the tests here log in as admin and rely on the default seed).
+   * Captured here as a TODO so the assertion shape survives any future
+   * fixture work; the jest unit test on `formatStamp(...)` covers the
+   * format-helper contract for the merge-blocking path.
    */
-  test.skip('plannings-table renders HH:mm:ss for actual stamp when site flag is on', async ({ page }) => {
-    // TODO(phase 4 fixture): seed AssignedSite.UseOneMinuteIntervals = true
-    // for the worker referenced by #cell3_0 AND a PlanRegistration row with
+  test.skip('plannings-table renders HH:mm for actual stamp when site flag is on', async ({ page }) => {
+    // TODO(fixture): seed AssignedSite.UseOneMinuteIntervals = true for the
+    // worker referenced by #cell3_0 AND a PlanRegistration row with
     // Start1StartedAt = '2026-05-15T07:03:53Z' on a date that lands inside
     // the dashboard's default visible range.
     //
@@ -400,12 +399,12 @@ test.describe('Dashboard — multi-shift (3-5) round-trip regression guard', ()
     //
     //   // The first-shift actual line is rendered with id firstShiftActual{rowIdx}_{colField}.
     //   const firstShiftActual = page.locator('[id^="firstShiftActual"]').first();
-    //   await expect(firstShiftActual).toContainText('07:03:53');
-    //   // Negative guard — the legacy 5-min path would render '07:00' / '07:05' instead.
-    //   await expect(firstShiftActual).not.toContainText(/07:0[05]\s/);
+    //   await expect(firstShiftActual).toContainText('07:03');
+    //   // Negative guard — seconds are never displayed even when the flag is on.
+    //   await expect(firstShiftActual).not.toContainText('07:03:53');
     //
     // Until the fixture lands the unit test
-    //   `formatStamp (Phase 4) — uses HH:mm:ss format when row.useOneMinuteIntervals is true`
+    //   `formatStamp — uses HH:mm format when row.useOneMinuteIntervals is true`
     // covers the format-helper contract (eform-client/src/app/plugins/modules/time-planning-pn/
     // components/plannings/time-plannings-table/time-plannings-table.component.spec.ts).
   });
diff --git a/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.spec.ts b/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.spec.ts
index b946aa85..36ddcf41 100644
--- a/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.spec.ts
+++ b/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.spec.ts
@@ -376,9 +376,10 @@ describe('TimePlanningsTableComponent', () => {
   });
 
   // ------------------------------------------------------------------
-  // Phase 4 — second-precision display when UseOneMinuteIntervals is on
+  // formatStamp / getStopTimeDisplayWithSeconds — always HH:mm
+  // (`useOneMinuteIntervals` retained on the row but no longer affects display)
   // ------------------------------------------------------------------
-  describe('formatStamp (Phase 4)', () => {
+  describe('formatStamp', () => {
     it('returns empty string when value is falsy', () => {
       expect(component.formatStamp({ useOneMinuteIntervals: true }, null)).toBe('');
       expect(component.formatStamp({ useOneMinuteIntervals: true }, undefined as any)).toBe('');
@@ -397,16 +398,16 @@ describe('TimePlanningsTableComponent', () => {
       expect(result).toBe('07:03');
     });
 
-    it("uses HH:mm:ss format when row.useOneMinuteIntervals is true", () => {
+    it("uses HH:mm format when row.useOneMinuteIntervals is true", () => {
       const transformSpy = jest
         .spyOn(component['datePipe'], 'transform')
-        .mockReturnValue('07:03:53');
+        .mockReturnValue('07:03');
       const result = component.formatStamp(
         { useOneMinuteIntervals: true },
         '2026-05-15T07:03:53Z',
       );
-      expect(transformSpy).toHaveBeenCalledWith('2026-05-15T07:03:53Z', 'HH:mm:ss', 'UTC');
-      expect(result).toBe('07:03:53');
+      expect(transformSpy).toHaveBeenCalledWith('2026-05-15T07:03:53Z', 'HH:mm', 'UTC');
+      expect(result).toBe('07:03');
     });
 
     it("falls back to HH:mm when row is null/undefined (defensive)", () => {
@@ -419,7 +420,7 @@ describe('TimePlanningsTableComponent', () => {
     });
   });
 
-  describe('getStopTimeDisplayWithSeconds (Phase 4)', () => {
+  describe('getStopTimeDisplayWithSeconds', () => {
     it('returns empty string when either timestamp is falsy', () => {
       expect(
         component.getStopTimeDisplayWithSeconds({ useOneMinuteIntervals: true }, null, '2026-05-15T10:00:00Z'),
@@ -452,21 +453,22 @@ describe('TimePlanningsTableComponent', () => {
       expect(result).toBe('15:30');
     });
 
-    it("uses HH:mm:ss format when flag on", () => {
+    it("uses HH:mm format when flag on", () => {
       const transformSpy = jest
         .spyOn(component['datePipe'], 'transform')
-        .mockReturnValue('15:30:11');
+        .mockReturnValue('15:30');
       const result = component.getStopTimeDisplayWithSeconds(
         { useOneMinuteIntervals: true },
         '2026-05-15T07:00:00Z',
         '2026-05-15T15:30:11Z',
       );
-      expect(transformSpy).toHaveBeenCalledWith('2026-05-15T15:30:11Z', 'HH:mm:ss', 'UTC');
-      expect(result).toBe('15:30:11');
+      expect(transformSpy).toHaveBeenCalledWith('2026-05-15T15:30:11Z', 'HH:mm', 'UTC');
+      expect(result).toBe('15:30');
     });
   });
 
-  describe('convertHoursToTimeWithSeconds (Phase 4)', () => {
+  // Dormant helper — production display no longer uses seconds.
+  describe('convertHoursToTimeWithSeconds', () => {
     it('formats whole-hour values with seconds suffix', () => {
       expect(component.convertHoursToTimeWithSeconds(8)).toBe('08:00:00');
     });
diff --git a/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.ts b/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.ts
index df7d582f..1a41f9c1 100644
--- a/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.ts
+++ b/eform-client/src/app/plugins/modules/time-planning-pn/components/plannings/time-plannings-table/time-plannings-table.component.ts
@@ -291,24 +291,22 @@ export class TimePlanningsTableComponent implements OnInit, OnChanges, AfterView
   }
 
   /**
-   * Phase 4 second-precision sibling of the inline `datePipe.transform(..., 'HH:mm', 'UTC')`
-   * calls used in the plannings table. When the row's site has
-   * <c>useOneMinuteIntervals</c> on, the actual stamp cells render at
-   * <c>HH:mm:ss</c>; otherwise falls through to the legacy <c>HH:mm</c>
-   * format so flag-off rows are byte-identical to before.
+   * Formats an actual shift timestamp for display in the plannings table.
+   * Always renders as `HH:mm`; seconds are never displayed regardless of
+   * the row's `useOneMinuteIntervals` flag. The `row` parameter is kept
+   * for call-site stability.
    */
   formatStamp(row: any, value: string | null | undefined): string {
     if (!value) {
       return '';
     }
-    const fmt = row?.useOneMinuteIntervals ? 'HH:mm:ss' : 'HH:mm';
-    return this.datePipe.transform(value, fmt, 'UTC') ?? '';
+    return this.datePipe.transform(value, 'HH:mm', 'UTC') ?? '';
   }
 
   /**
-   * Phase 4 second-precision sibling of {@link getStopTimeDisplay}. Same
-   * cross-day "24:00" guard as the legacy method, but emits seconds in the
-   * normal case when the row's site has the flag on.
+   * Stop-time display sibling of {@link getStopTimeDisplay} with the same
+   * cross-day "24:00" guard. Always renders as `HH:mm`; the `WithSeconds`
+   * suffix is a historical name — seconds are not emitted.
    */
   getStopTimeDisplayWithSeconds(row: any, startedAt: string | null, stoppedAt: string | null): string {
     if (!startedAt || !stoppedAt) {
@@ -323,8 +321,7 @@ export class TimePlanningsTableComponent implements OnInit, OnChanges, AfterView
     ) {
       return '24:00';
     }
-    const fmt = row?.useOneMinuteIntervals ? 'HH:mm:ss' : 'HH:mm';
-    return this.datePipe.transform(stoppedAt, fmt, 'UTC') ?? '';
+    return this.datePipe.transform(stoppedAt, 'HH:mm', 'UTC') ?? '';
   }
 
   onFirstColumnClick(row: any): void {
diff --git a/eform-client/src/app/plugins/modules/time-planning-pn/models/plannings/time-planning.model.ts b/eform-client/src/app/plugins/modules/time-planning-pn/models/plannings/time-planning.model.ts
index b99d0b57..5c6faa7d 100644
--- a/eform-client/src/app/plugins/modules/time-planning-pn/models/plannings/time-planning.model.ts
+++ b/eform-client/src/app/plugins/modules/time-planning-pn/models/plannings/time-planning.model.ts
@@ -16,10 +16,11 @@ export class TimePlanningModel {
   deviceManufacturer: string;
   softwareVersionIsValid: boolean;
   /**
-   * Phase 4: mirror of the row's assigned-site UseOneMinuteIntervals flag.
-   * When true, the plannings table renders actual stamps at HH:mm:ss instead
-   * of HH:mm. Default false preserves byte-identical legacy behavior for
-   * rows whose site has the flag off.
+   * Mirror of the row's assigned-site UseOneMinuteIntervals flag. The flag now
+   * controls only (a) the wire-precision of stored start/stop timestamps and
+   * (b) the minutesGap input granularity in the workday-entity dialog (1-min
+   * vs 5-min). Displayed timestamps in the plannings table always show
+   * HH:mm regardless of the flag.
    */
   useOneMinuteIntervals: boolean;
 }