diff --git a/internal/service/week_service.go b/internal/service/week_service.go
index ede4063..365d489 100644
--- a/internal/service/week_service.go
+++ b/internal/service/week_service.go
@@ -197,9 +197,11 @@ func (s *WeekService) CloseWeek(ctx context.Context, weekKey string) (*domain.Cl
 	// Compute expected ms for the week (from settings frozen at week start)
 	expectedMs := int64(set.HoursPerWeek * 3_600_000)
 
-	// Verify all past workdays that have entries are closed; collect worked ms.
-	// Past workdays with no entries at all are skipped (they contribute 0h).
-	// Future workdays in the week are always skipped.
+	// Collect worked ms across all workdays in the week.
+	// A workday is included if it has a closed_days record — whether past or future
+	// (future days can be pre-marked as holiday/vacation before closing the week early).
+	// Past workdays with open entries require an explicit close before the week can close.
+	// Past workdays with no record and no entries contribute 0h.
 	todayKey := s.clock.Now().In(s.tz).Format("2006-01-02")
 	var totalWorkedMs int64
 	for _, dk := range dayKeys {
@@ -207,18 +209,20 @@ func (s *WeekService) CloseWeek(ctx context.Context, weekKey string) (*domain.Cl
 		if !set.IsWorkday(int(t.Weekday())) {
 			continue // weekend or non-workday — skip
 		}
-		if dk > todayKey {
-			continue // future workday — skip
-		}
 		cd, err := s.closedDays.GetByDayKey(ctx, dk)
 		if err != nil && !errors.Is(err, sql.ErrNoRows) {
 			return nil, err
 		}
 		if cd != nil {
+			// Already closed (past or pre-marked future) — count it.
 			totalWorkedMs += cd.WorkedMs
 			continue
 		}
-		// No closed_days record — check whether the day has any entries.
+		if dk > todayKey {
+			// Future workday with no closed record — entries are impossible, skip.
+			continue
+		}
+		// Past/today workday with no closed record — check whether entries exist.
 		dayEntries, err := s.entries.ListByDayKey(ctx, dk)
 		if err != nil {
 			return nil, err
diff --git a/internal/service/week_service_test.go b/internal/service/week_service_test.go
index b7e8e23..7da6db8 100644
--- a/internal/service/week_service_test.go
+++ b/internal/service/week_service_test.go
@@ -246,7 +246,7 @@ func TestCloseWeekMidWeek(t *testing.T) {
 		t.Errorf("expected_ms: want %s, got %s", wantExpected, time.Duration(cw.ExpectedMs)*time.Millisecond)
 	}
 	const wantDelta = wantWorked - wantExpected // −11.5h
-	if cw.DeltaMs != int64(wantDelta) {
+	if cw.DeltaMs != int64(wantDelta/time.Millisecond) {
 		t.Errorf("delta_ms: want %s, got %s", wantDelta, time.Duration(cw.DeltaMs)*time.Millisecond)
 	}
 }