diff --git a/app/Modules/Audit/Http/Controllers/DashboardController.php b/app/Modules/Audit/Http/Controllers/DashboardController.php
index ba875a6b..fb63f522 100644
--- a/app/Modules/Audit/Http/Controllers/DashboardController.php
+++ b/app/Modules/Audit/Http/Controllers/DashboardController.php
@@ -155,8 +155,12 @@ class DashboardController extends Controller
      *
      * Every boundary is built in the viewer's zone, so "last week" ends
      * when their evening does and not at whatever hour UTC midnight falls
-     * on for them. The returned instants are still absolute — only the
-     * day edges moved — so they compare against the UTC column directly.
+     * on for them. The instants are absolute, but they carry that zone —
+     * and a Carbon handed to the query builder is formatted in its own
+     * zone, offset discarded, so comparing one against a UTC column asks
+     * a question nine hours out for a viewer in Tokyo. transferSeries()
+     * converts before it compares; the day cursor there keeps them as
+     * they are, because that half really is about the viewer's calendar.
      *
      * @return array{0: Carbon, 1: Carbon, 2: string}
      */
@@ -248,7 +252,13 @@ class DashboardController extends Controller
 
         $rows = ActivityLog::query()
             ->whereIn('action', [Action::FileUploaded->value, ...array_map(fn (Action $a): string => $a->value, $downloadActions)])
-            ->whereBetween('created_at', [$from, $to])
+            // In UTC, because that is what the column is. The query
+            // builder formats a Carbon in whatever zone the object holds
+            // and drops the offset, so passing the viewer's midnight
+            // straight in compares "2026-08-22 00:00:00" against a UTC
+            // column — nine hours of somebody else's day, at both ends,
+            // for a viewer in Tokyo.
+            ->whereBetween('created_at', [$from->copy()->utc(), $to->copy()->utc()])
             ->get(['action', 'actor_type', 'created_at'])
             // Bucketed by the viewer's calendar day. Grouping on the UTC
             // one puts an evening upload from anywhere west of Greenwich
diff --git a/tests/Feature/Audit/DashboardTest.php b/tests/Feature/Audit/DashboardTest.php
index a3e03e53..5f549a68 100644
--- a/tests/Feature/Audit/DashboardTest.php
+++ b/tests/Feature/Audit/DashboardTest.php
@@ -17,6 +17,7 @@ use App\Modules\Platform\Capabilities\Edition;
 use App\Modules\Platform\Settings\Setting;
 use App\Modules\Platform\Settings\Settings;
 use Illuminate\Http\UploadedFile;
+use Illuminate\Support\Carbon;
 use Illuminate\Support\Facades\Storage;
 use Illuminate\Support\Str;
 use Inertia\Testing\AssertableInertia;
@@ -153,6 +154,36 @@ test('the transfers widget honors the range selector', function () {
     );
 });
 
+test('the transfers window is read in UTC, whatever zone the viewer is in', function () {
+    // The boundaries are built in the viewer's zone on purpose, but the
+    // column is UTC and the query builder formats a Carbon in its own zone
+    // with the offset thrown away. For Asia/Tokyo that asks for
+    // "2026-08-16 00:00:00" where the viewer's window really begins at
+    // 2026-08-15 15:00:00Z — the first nine hours of their week are
+    // missing from the chart.
+    $viewer = User::factory()->create(['timezone' => 'Asia/Tokyo']);
+    $file = File::factory()->create(['uploaded_by' => $viewer->id, 'name' => 'early upload']);
+
+    // 11:00 on the 22nd in Tokyo. "Last week" is their 16th to their 22nd.
+    $this->travelTo(Carbon::parse('2026-08-22 02:00:00', 'UTC'));
+
+    // 01:00 on the 16th in Tokyo: the first hour of the window, and before
+    // "2026-08-16 00:00:00" read as UTC.
+    ActivityLog::query()->create([
+        'actor_id' => $viewer->id, 'actor_name' => $viewer->name, 'actor_type' => 'staff',
+        'action' => Action::FileUploaded, 'subject_type' => $file->getMorphClass(),
+        'subject_id' => $file->id, 'subject_name' => $file->name,
+        'created_at' => Carbon::parse('2026-08-15 16:00:00', 'UTC'),
+    ]);
+
+    $props = $this->actingAs($viewer)->get('/dashboard?range=last_week')->assertOk()->viewData('page')['props'];
+
+    expect(collect($props['transfers'])->sum('uploads'))->toBe(1)
+        ->and(collect($props['transfers'])->firstWhere('date', '2026-08-16')['uploads'])->toBe(1);
+
+    $this->travelBack();
+});
+
 test('the top-clients-by-storage widget ranks clients by usage against their effective quota', function () {
     app(Settings::class)->set(Setting::DefaultClientStorageQuotaMb, 200);