diff --git a/app/views/sites/edit.html.haml b/app/views/sites/edit.html.haml
--- a/app/views/sites/edit.html.haml
+++ b/app/views/sites/edit.html.haml
@@ -31,6 +31,7 @@
 :javascript
   $('.input-group.date').datetimepicker({
     format: 'DD/MMM/YYYY HH:mm',
+    locale: 'en',
     showTodayButton: true,
   });