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(
+              'Y-m-d' => pht('ISO 8601 (2000-02-28)'),
+              'n/j/Y' => pht('US (2/28/2000)'),
+              'd-m-Y' => pht('European (28-02-2000)'),
+            ))
+          ->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, 'Y-m-d');
   }
 
   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/src/view/form/control/AphrontFormDateControlValue.php b/src/view/form/control/AphrontFormDateControlValue.php
--- a/src/view/form/control/AphrontFormDateControlValue.php
+++ b/src/view/form/control/AphrontFormDateControlValue.php
@@ -10,6 +10,7 @@
   private $zone;
   private $optional;
 
+
   public function getValueDate() {
     return $this->valueDate;
   }
@@ -65,7 +66,11 @@
 
     $value = new AphrontFormDateControlValue();
     $value->viewer = $viewer;
-    $value->valueDate = $month.'/'.$day.'/'.$year;
+    $value->valueDate = $value->getFormattedDateFromParts(
+      $year,
+      $month,
+      $day,
+      $value);
     $value->valueTime = coalesce($time, '12:00 AM');
     $value->valueEnabled = $enabled;
 
@@ -75,10 +80,13 @@
   public static function newFromRequest(AphrontRequest $request, $key) {
     $value = new AphrontFormDateControlValue();
     $value->viewer = $request->getViewer();
-    $value->valueDate = $request->getStr($key.'_d');
+
+    $value->valueDate = $value->getFormattedDateFromDate(
+      $request->getStr($key.'_d'),
+      $value);
+
     $value->valueTime = $request->getStr($key.'_t');
     $value->valueEnabled = $request->getStr($key.'_e');
-
     return $value;
   }
 
@@ -92,7 +100,11 @@
     $month = $readable[1];
     $day   = $readable[2];
 
-    $value->valueDate = $month.'/'.$day.'/'.$year;
+    $value->valueDate = $value->getFormattedDateFromParts(
+      $year,
+      $month,
+      $day,
+      $value);
     $value->valueTime  = $readable[3];
 
 
@@ -105,7 +117,10 @@
     $value = new AphrontFormDateControlValue();
     $value->viewer = $viewer;
 
-    $value->valueDate = idx($dictionary, 'd');
+    $value->valueDate = $value->getFormattedDateFromDate(
+      idx($dictionary, 'd'),
+      $value);
+
     $value->valueTime = idx($dictionary, 't');
     $value->valueEnabled = idx($dictionary, 'e');
 
@@ -185,6 +200,45 @@
     return $value;
   }
 
+  private function getDateFormat() {
+    $preferences = $this->viewer->loadPreferences();
+    $pref_date_format = PhabricatorUserPreferences::PREFERENCE_DATE_FORMAT;
+
+    return $preferences->getPreference($pref_date_format, 'Y-m-d');
+  }
+
+  private function getFormattedDateFromDate($date, $value) {
+    $original_input = $date;
+    $zone = $value->getTimezone();
+    $separator = $value->getFormatSeparator();
+    $parts = preg_split('@[,./:-]@', $date);
+    $date = implode($separator, $parts);
+    $date = id(new DateTime($date, $zone));
+
+    if ($date) {
+      return $date->format($value->getDateFormat());
+    } else {
+      return $original_input;
+    }
+  }
+
+  private function getFormattedDateFromParts($year, $month, $day, $value) {
+    $zone = $value->getTimezone();
+
+    return id(new DateTime("{$year}-{$month}-{$day}", $zone))
+      ->format($value->getDateFormat());
+  }
+
+  private function getFormatSeparator() {
+    $format = $this->getDateFormat();
+    switch ($format) {
+      case 'n/j/Y':
+        return '/';
+      default:
+        return '-';
+    }
+  }
+
   public function getDateTime() {
     $epoch = $this->getEpoch();
     $date = null;
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 +20,32 @@
   var value_m;
   var value_d;
 
+  var get_format_separator = function() {
+    var format = get_format();
+    switch (format.toLowerCase()) {
+      case 'n/j/y':
+        return '/';
+      default:
+        return '-';
+    }
+  };
+
+  var get_key_maps = function() {
+    var format = get_format();
+    var regex = new RegExp('[./ -]');
+    return format.split(regex);
+  };
+
+  var get_format = function() {
+    var format = config.format;
+
+    if (format === null) {
+      format = 'Y-m-d';
+    }
+
+    return format;
+  };
+
   var onopen = function(e) {
     e.kill();
 
@@ -85,18 +115,76 @@
     };
   };
 
-  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 regex = new RegExp('[./ -]');
+    var date_parts = date.split(regex);
+    var map = get_key_maps();
+
+    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 = get_key_maps();
+    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 'n':
+          arr_values[i] = value_m;
+          break;
+        case 'd':
+          arr_values[i] = value_d;
+          break;
+        case 'j':
+          arr_values[i] = value_d;
+          break;
+      }
+    }
+
+    var text_value = '';
+    var separator = get_format_separator();
+
+    for(var j=0; j < arr_values.length; j++) {
+      var element = arr_values[j];
+      var format = get_format();
+
+      if ((format.toLowerCase() === 'd-m-y' ||
+        format.toLowerCase() === 'y-m-d') &&
+        element < 10) {
+        element = '0' + element;
+      }
+
+      if (text_value.length === 0) {
+        text_value += element;
+      } else {
+        text_value = text_value + separator + element;
+      }
+    }
+
+    inputs.d.value = text_value;
   };
 
   var render = function() {