diff --git a/hledger-web/static/hledger.js b/hledger-web/static/hledger.js
index 88647dae5..4903339aa 100644
--- a/hledger-web/static/hledger.js
+++ b/hledger-web/static/hledger.js
@@ -9,7 +9,8 @@ $(document).ready(function() {
   var dateEl = $('#dateWrap').datepicker({
     showOnFocus: false,
     autoclose: true,
-    format: 'yyyy-mm-dd'
+    format: 'yyyy-mm-dd',
+    weekStart: 1 // Monday
   });;
 
   // ensure add form always focuses its first field