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
@@ -169,7 +169,8 @@
     return phabricator_format_local_time(
       $epoch,
       $this->viewer,
-      $format);
+      $format,
+      false); // Don't translate the date, to allow us to reparse it later
   }
 
   public function getEpoch() {
diff --git a/src/view/viewutils.php b/src/view/viewutils.php
--- a/src/view/viewutils.php
+++ b/src/view/viewutils.php
@@ -107,9 +107,12 @@
  * @param int $epoch Unix epoch timestamp.
  * @param PhabricatorUser $user User viewing the timestamp.
  * @param string $format Date format, as per DateTime class.
+ * @param bool $translate (optional) Whether to translate individual date
+ *		elements. If set to false, will leave them in English, but
+ *		still apply the user's timezone preferences.
  * @return string Formatted, local date/time.
  */
-function phabricator_format_local_time($epoch, $user, $format) {
+function phabricator_format_local_time($epoch, $user, $format, $translate = true) {
   if (!$epoch) {
     // If we're missing date information for something, the DateTime class will
     // throw an exception when we try to construct an object. Since this is a
@@ -140,6 +143,9 @@
   }
 
   $date->setTimezone($zone);
-
-  return PhutilTranslator::getInstance()->translateDate($format, $date);
+  if ($translate) {
+    return PhutilTranslator::getInstance()->translateDate($format, $date);
+  } else {
+    return $date->format($format);
+  }
 }