diff --git a/src/applications/settings/panel/PhabricatorDateTimeSettingsPanel.php b/src/applications/settings/panel/PhabricatorDateTimeSettingsPanel.php
--- a/src/applications/settings/panel/PhabricatorDateTimeSettingsPanel.php
+++ b/src/applications/settings/panel/PhabricatorDateTimeSettingsPanel.php
@@ -19,6 +19,7 @@
     $username = $user->getUsername();
 
     $pref_time = PhabricatorUserPreferences::PREFERENCE_TIME_FORMAT;
+    $pref_date = PhabricatorUserPreferences::PREFERENCE_DATE_FORMAT;
     $pref_week_start = PhabricatorUserPreferences::PREFERENCE_WEEK_START_DAY;
     $preferences = $user->loadPreferences();
 
@@ -31,12 +32,16 @@
         $errors[] = pht('The selected timezone is not a valid timezone.');
       }
 
-      $preferences->setPreference(
-        $pref_time,
-        $request->getStr($pref_time));
-      $preferences->setPreference(
-        $pref_week_start,
-        $request->getStr($pref_week_start));
+      $preferences
+        ->setPreference(
+          $pref_time,
+          $request->getStr($pref_time))
+        ->setPreference(
+          $pref_date,
+          $request->getStr($pref_date))
+        ->setPreference(
+          $pref_week_start,
+          $request->getStr($pref_week_start));
 
       if (!$errors) {
         $preferences->save();
@@ -71,6 +76,18 @@
           ->setValue($preferences->getPreference($pref_time)))
       ->appendChild(
         id(new AphrontFormSelectControl())
+          ->setLabel(pht('Date Format'))
+          ->setName($pref_date)
+          ->setOptions(array(
+              'm/d/Y' => pht('US (2/28/2000)'),
+              'd/m/Y' => pht('Little-Endian (28/2/2000)'),
+              'Y/m/d' => pht('Big-Endian (2000/2/28)'),
+            ))
+          ->setCaption(
+            pht('Format used when rendering a date.'))
+          ->setValue($preferences->getPreference($pref_date)))
+      ->appendChild(
+        id(new AphrontFormSelectControl())
           ->setLabel(pht('Week Starts On'))
           ->setOptions($this->getWeekDays())
           ->setName($pref_week_start)
diff --git a/src/applications/settings/storage/PhabricatorUserPreferences.php b/src/applications/settings/storage/PhabricatorUserPreferences.php
--- a/src/applications/settings/storage/PhabricatorUserPreferences.php
+++ b/src/applications/settings/storage/PhabricatorUserPreferences.php
@@ -8,6 +8,7 @@
   const PREFERENCE_MULTIEDIT            = 'multiedit';
   const PREFERENCE_TITLES               = 'titles';
   const PREFERENCE_MONOSPACED_TEXTAREAS = 'monospaced-textareas';
+  const PREFERENCE_DATE_FORMAT          = 'date-format';
   const PREFERENCE_TIME_FORMAT          = 'time-format';
   const PREFERENCE_WEEK_START_DAY       = 'week-start-day';
 
diff --git a/src/view/form/control/AphrontFormDateControl.php b/src/view/form/control/AphrontFormDateControl.php
--- a/src/view/form/control/AphrontFormDateControl.php
+++ b/src/view/form/control/AphrontFormDateControl.php
@@ -127,7 +127,21 @@
   }
 
   private function getDateInputValue() {
-    return $this->valueDate;
+    $date_format = $this->getDateFormat();
+    $timezone = $this->getTimezone();
+
+    $datetime = new DateTime("{$this->valueDate}", $timezone);
+    $date = $datetime->format($date_format);
+
+    return $date;
+  }
+
+  private function getDateFormat() {
+    $viewer = $this->getUser();
+    $preferences = $viewer->loadPreferences();
+    $pref_date_format = PhabricatorUserPreferences::PREFERENCE_DATE_FORMAT;
+
+    return $preferences->getPreference($pref_date_format, 'm/d/Y');
   }
 
   private function getTimeInputValue() {
@@ -242,7 +256,9 @@
       ),
       $time_sel);
 
-    Javelin::initBehavior('fancy-datepicker', array());
+    Javelin::initBehavior('fancy-datepicker', array(
+      'format' => $this->getDateFormat(),
+      ));
 
     $classes = array();
     $classes[] = 'aphront-form-date-container';
diff --git a/webroot/rsrc/js/core/behavior-fancy-datepicker.js b/webroot/rsrc/js/core/behavior-fancy-datepicker.js
--- a/webroot/rsrc/js/core/behavior-fancy-datepicker.js
+++ b/webroot/rsrc/js/core/behavior-fancy-datepicker.js
@@ -7,7 +7,11 @@
  *           javelin-vector
  */
 
-JX.behavior('fancy-datepicker', function() {
+JX.behavior('fancy-datepicker', function(config, statics) {
+  if (statics.initialized) {
+    return;
+  }
+  statics.initialized = true;
 
   var picker;
   var root;
@@ -16,6 +20,21 @@
   var value_m;
   var value_d;
 
+  function getKeyMap() {
+    var format = getFormat();
+    return format.split('/');
+  }
+
+  function getFormat() {
+    var f = config.format;
+
+    if (f === null) {
+      f = 'm/d/Y';
+    }
+
+    return f;
+  }
+
   var onopen = function(e) {
     e.kill();
 
@@ -85,18 +104,60 @@
     };
   };
 
-  var read_date = function() {
-    var i = get_inputs();
-    var date = i.d.value;
-    var parts = date.split('/');
-    value_y = +parts[2];
-    value_m = +parts[0];
-    value_d = +parts[1];
+  var read_date = function(){
+    var inputs = get_inputs();
+    var date = inputs.d.value;
+    var date_parts = date.split('/');
+    var map = getKeyMap();
+
+    for (var i=0; i < date_parts.length; i++) {
+      var key = map[i].toLowerCase();
+
+      switch (key) {
+        case 'y':
+          value_y = date_parts[i];
+          break;
+        case 'm':
+          value_m = date_parts[i];
+          break;
+        case 'd':
+          value_d = date_parts[i];
+          break;
+      }
+    }
   };
 
   var write_date = function() {
-    var i = get_inputs();
-    i.d.value = value_m + '/' + value_d + '/' + value_y;
+    var inputs = get_inputs();
+    var map = getKeyMap();
+    var arr_values = [];
+
+    for(var i=0; i < map.length; i++) {
+      switch (map[i].toLowerCase()) {
+        case 'y':
+          arr_values[i] = value_y;
+          break;
+        case 'm':
+          arr_values[i] = value_m;
+          break;
+        case 'd':
+          arr_values[i] = value_d;
+          break;
+      }
+    }
+
+    var text_value = '';
+
+    for(var j=0; j < arr_values.length; j++) {
+      var element = arr_values[j] ? arr_values[j] : '';
+      if (text_value.length === 0) {
+        text_value += element;
+      } else {
+        text_value = text_value + '/' + element;
+      }
+    }
+
+    inputs.d.value = text_value;
   };
 
   var render = function() {