diff --git a/resources/celerity/map.php b/resources/celerity/map.php
index 54000b66cf..3f58140cad 100644
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -122,7 +122,7 @@ return array(
     'rsrc/css/layout/phabricator-source-code-view.css' => '2ceee894',
     'rsrc/css/phui/calendar/phui-calendar-day.css' => '3b4a65d8',
     'rsrc/css/phui/calendar/phui-calendar-list.css' => '3e713fc7',
-    'rsrc/css/phui/calendar/phui-calendar-month.css' => '7cf00f61',
+    'rsrc/css/phui/calendar/phui-calendar-month.css' => '017a953b',
     'rsrc/css/phui/calendar/phui-calendar.css' => '8345be98',
     'rsrc/css/phui/phui-action-header-view.css' => '89c497e7',
     'rsrc/css/phui/phui-action-list.css' => '4f4d09f2',
@@ -763,7 +763,7 @@ return array(
     'phui-calendar-css' => '8345be98',
     'phui-calendar-day-css' => '3b4a65d8',
     'phui-calendar-list-css' => '3e713fc7',
-    'phui-calendar-month-css' => '7cf00f61',
+    'phui-calendar-month-css' => '017a953b',
     'phui-crumbs-view-css' => '594d719e',
     'phui-document-view-css' => '94d5dcd8',
     'phui-feed-story-css' => 'c9f3a0b5',
diff --git a/webroot/rsrc/css/phui/calendar/phui-calendar-month.css b/webroot/rsrc/css/phui/calendar/phui-calendar-month.css
index bb02c4c54d..43c9af18cf 100644
--- a/webroot/rsrc/css/phui/calendar/phui-calendar-month.css
+++ b/webroot/rsrc/css/phui/calendar/phui-calendar-month.css
@@ -98,7 +98,7 @@ table.phui-calendar-view a.phui-calendar-week-number {
   color: {$lightgreyborder};
   padding: 4px;
   display: inline-block;
-  min-width: 16px;
+  width: 16px;
   text-align: center;
   float: left;
 }
@@ -107,10 +107,15 @@ table.phui-calendar-view a.phui-calendar-date-number {
   color: {$lightgreytext};
   padding: 4px;
   display: inline-block;
-  min-width: 16px;
+  width: 16px;
   text-align: center;
 }
 
+.device table.phui-calendar-view a.phui-calendar-week-number,
+.device table.phui-calendar-view a.phui-calendar-date-number {
+  width: 12px;
+}
+
 table.phui-calendar-view td.phui-calendar-date-number-container {
   font-weight: normal;
   color: {$lightgreytext};