diff --git a/resources/assets/javascripts/studip-ui.js b/resources/assets/javascripts/studip-ui.js
index 9d283a6c64d7d192f168b48e14f4561609d9598a..f563b3183228bd5cc155dc9abbf1f31ee3f3170b 100644
--- a/resources/assets/javascripts/studip-ui.js
+++ b/resources/assets/javascripts/studip-ui.js
@@ -603,7 +603,7 @@ import RestrictedDatesHelper from './lib/RestrictedDatesHelper';
                 $gettext('Sa')
             ],
             weekHeader: $gettext('Wo'),
-            dateFormat: String.locale === 'en-GB' ? 'mm/dd/yy' : 'dd.mm.yy',
+            dateFormat: 'dd.mm.yy',
             firstDay: 1,
             isRTL: false,
             showMonthAfterYear: false,