diff --git a/themes/base/ui.datepicker.css b/themes/base/ui.datepicker.css
index 4ef681088..cf9fb8327 100644
--- a/themes/base/ui.datepicker.css
+++ b/themes/base/ui.datepicker.css
@@ -16,7 +16,8 @@
 .ui-datepicker select.ui-datepicker-year { width: 49%;}
 .ui-datepicker .ui-datepicker-title select.ui-datepicker-year { float: right; }
 .ui-datepicker table {width: 100%; font-size: .9em; border-collapse: collapse; margin:0 0 .4em; }
-.ui-datepicker th { padding: .7em .3em; text-align: center; font-weight: bold;  }
+.ui-datepicker th { padding: .7em .3em; text-align: center; font-weight: bold; border: 0;  }
+.ui-datepicker td { border: 0; padding: 1px; }
 .ui-datepicker td span, .ui-datepicker td a { display: block; padding: .2em; text-align: right; text-decoration: none; }
 .ui-datepicker .ui-datepicker-buttonpane { background-image: none; margin: .7em 0 0 0; padding:0 .2em; border-left: 0; border-right: 0; border-bottom: 0; }
 .ui-datepicker .ui-datepicker-buttonpane button { float: right; margin: .5em .2em .4em; cursor: pointer; padding: .2em .6em .3em .6em; width:auto; overflow:visible; }