diff --git a/core/modules/locale/locale.datepicker.js b/core/modules/locale/locale.datepicker.js
index 927bbc8e92..70e5c770c6 100644
--- a/core/modules/locale/locale.datepicker.js
+++ b/core/modules/locale/locale.datepicker.js
@@ -18,7 +18,7 @@
         dayNames: [Drupal.t('Sunday'), Drupal.t('Monday'), Drupal.t('Tuesday'), Drupal.t('Wednesday'), Drupal.t('Thursday'), Drupal.t('Friday'), Drupal.t('Saturday')],
         dayNamesShort: [Drupal.t('Sun'), Drupal.t('Mon'), Drupal.t('Tue'), Drupal.t('Wed'), Drupal.t('Thu'), Drupal.t('Fri'), Drupal.t('Sat')],
         dayNamesMin: [Drupal.t('Su'), Drupal.t('Mo'), Drupal.t('Tu'), Drupal.t('We'), Drupal.t('Th'), Drupal.t('Fr'), Drupal.t('Sa')],
-        dateFormat: Drupal.t('mm/dd/yy'),
+        dateFormat: 'mm/dd/yy',
         firstDay: 0,
         isRTL: 0
       }, drupalSettings.jquery.ui.datepicker);