firstDay: 1
<html> <head> <script type='text/javascript' src='js/jquery-1.3.2.js'></script> <script type="text/javascript" src="js/ui/ui.core.js"></script> <script type="text/javascript" src="js/ui/ui.datepicker.js"></script> <script type='text/javascript'> $(document).ready( function() { $('input#tmpDate').datepicker({ firstDay: 1 }); } ); </script> </head> <body> <div> <label for='tmpDate'>Date:</label> <input type='text' id='tmpDate' size='25' value='' /> </div> </body> </html>