diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -362,7 +362,7 @@
     'rsrc/js/application/aphlict/behavior-aphlict-status.js' => 'ea681761',
     'rsrc/js/application/aphlict/behavior-desktop-notifications-control.js' => 'edd1ba66',
     'rsrc/js/application/auth/behavior-persona-login.js' => '9414ff18',
-    'rsrc/js/application/calendar/behavior-day-view.js' => '5c46cff2',
+    'rsrc/js/application/calendar/behavior-day-view.js' => '1a5bb063',
     'rsrc/js/application/calendar/behavior-event-all-day.js' => '38dcf3c8',
     'rsrc/js/application/calendar/behavior-recurring-edit.js' => '5f1c4d5f',
     'rsrc/js/application/config/behavior-reorder-fields.js' => 'b6993408',
@@ -603,7 +603,7 @@
     'javelin-behavior-dashboard-move-panels' => '019f36c4',
     'javelin-behavior-dashboard-query-panel-select' => '453c5375',
     'javelin-behavior-dashboard-tab-panel' => 'd4eecc63',
-    'javelin-behavior-day-view' => '5c46cff2',
+    'javelin-behavior-day-view' => '1a5bb063',
     'javelin-behavior-desktop-notifications-control' => 'edd1ba66',
     'javelin-behavior-detect-timezone' => '4c193c96',
     'javelin-behavior-device' => 'bb1dd507',
diff --git a/src/view/phui/calendar/PHUICalendarDayView.php b/src/view/phui/calendar/PHUICalendarDayView.php
--- a/src/view/phui/calendar/PHUICalendarDayView.php
+++ b/src/view/phui/calendar/PHUICalendarDayView.php
@@ -61,7 +61,7 @@
     foreach ($hours as $hour) {
       $js_hours[] = array(
         'hour' => $hour->format('G'),
-        'hour_meridian' => $hour->format('g A'),
+        'displayTime' => phabricator_time($hour->format('U'), $viewer),
       );
     }
 
diff --git a/webroot/rsrc/js/application/calendar/behavior-day-view.js b/webroot/rsrc/js/application/calendar/behavior-day-view.js
--- a/webroot/rsrc/js/application/calendar/behavior-day-view.js
+++ b/webroot/rsrc/js/application/calendar/behavior-day-view.js
@@ -169,13 +169,13 @@
       var cell_time = JX.$N(
         'td',
         {className: 'phui-calendar-day-hour'},
-        hours[i]['hour_meridian']);
+        hours[i].displayTime);
 
       var cell_event = JX.$N(
         'td',
         {
           meta: {
-            time: hours[i]['hour_meridian']
+            time: hours[i].displayTime
           },
           className: 'phui-calendar-day-events',
           sigil: 'phui-calendar-day-event-cell'