diff --git a/plugins/libkolab/skins/elastic/include/calendar.less b/plugins/libkolab/skins/elastic/include/calendar.less
index 12e82fae..a228a3ee 100644
--- a/plugins/libkolab/skins/elastic/include/calendar.less
+++ b/plugins/libkolab/skins/elastic/include/calendar.less
@@ -165,11 +165,7 @@ fieldset.categories .input-group {
 .calendar-datepicker {
     // overwrite jQuery-UI datepicker styles
     .ui-datepicker {
-        top: initial !important;
-        left: initial !important;
-        position: relative !important;
-        transform: unset;
-        box-shadow: none;
+        margin: 0 !important;
         border: 0;
         border-radius: 0;
         width: auto;