diff --git a/www/admin/inner.js b/www/admin/inner.js
index 8e3ed16d2..527b081c5 100644
--- a/www/admin/inner.js
+++ b/www/admin/inner.js
@@ -1314,19 +1314,23 @@ define([
             var $start = $(start);
             var $end = $(end);
             var is24h = false;
+            var dateFormat = "Y-m-d H:i";
             try {
                 is24h = !new Intl.DateTimeFormat(navigator.language, { hour: 'numeric' }).format(0).match(/AM/);
             } catch (e) {}
+            if (!is24h) { dateFormat = "Y-m-d h:i K"; }
 
             var endPickr = Flatpickr(end, {
                 enableTime: true,
                 time_24hr: is24h,
+                dateFormat: dateFormat,
                 minDate: new Date()
             });
             Flatpickr(start, {
                 enableTime: true,
                 time_24hr: is24h,
                 minDate: new Date(),
+                dateFormat: dateFormat,
                 onChange: function () {
                     endPickr.set('minDate', new Date($start.val()));
                 }
diff --git a/www/lib/calendar/date-picker.js b/www/lib/calendar/date-picker.js
index bc42dbbeb..d66e98c3d 100644
--- a/www/lib/calendar/date-picker.js
+++ b/www/lib/calendar/date-picker.js
@@ -9,14 +9,17 @@ define([
         var end = cfg.endpicker;
 
         var is24h = false
+        var dateFormat = "Y-m-d H:i";
         try {
             is24h = !new Intl.DateTimeFormat(navigator.language, { hour: 'numeric' }).format(0).match(/AM/);
         } catch (e) {}
+        if (!is24h) { dateFormat = "Y-m-d h:i K"; }
 
         var e = $(end.input)[0];
         var endPickr = Flatpickr(e, {
             enableTime: true,
             time_24hr: is24h,
+            dateFormat: dateFormat,
             minDate: start.date
         });
         endPickr.setDate(end.date);
@@ -25,6 +28,7 @@ define([
         var startPickr = Flatpickr(s, {
             enableTime: true,
             time_24hr: is24h,
+            dateFormat: dateFormat,
             onChange: function () {
                 endPickr.set('minDate', startPickr.parseDate(s.value));
             }