I have created a page called mysite and have permalink as /XXX/wordpress/mysite On this page I am creating a calendar. The calendar is working little wierd. It is working for a current year but when on clicking next or previous button as soon as it switches to next or previous year calendar gets disappear and show following (default page not found) message "Well this is somewhat embarrassing, isn’t it?" calendar is made using following code CSS: <style type="text/css"> .body { font-family: Verdana; background-color : #ACACAC;; } .tr { background-color : #ACACAC; } .th { font-family: Verdana; } a.buttonbar:link, a.buttonbar:visited { font-size : 9px; padding-top : 1px; padding-bottom : 1px; text-decoration : none; background-color : #ACACAC; color : #FFFFFF } a.buttonbar:hover { padding-top : 1px; padding-bottom : 1px; background-color : #CCCCCC; color : #FFFFFF } .normal { font-family: Verdana; font-size: 8pt; color: #000000; } .today { font-family: Verdana; font-size: 8pt; font-weight:bold; color:#000066; background-color: #CACACA; } .weekend { font-family: Verdana; font-size: 8pt; color:#FF0000; } .selected { font-family: Verdana; font-size: 8pt; color: #FFFFFF; background-color: #C00000; } .event { font-family: Verdana; font-size: 8pt; color: #000000; background-color: #C6D1DC; } .head { color:#CCCCCC; font:Arial, Helvetica, sans-serif; font-size:12px; font-weight:500; background-color:#000066; } .title { color:#000066; font:Arial, Helvetica, sans-serif; font-size:12px; font-weight:bold; } .button { font-family : Verdana, Arial, Helvetica, sans-serif; font-style : normal; font-weight : bold; font-size : 10px; color : #000000; background-color : #F0F0F0; border : 1px solid #000066; } </style> SCRIPT: <script language="javascript"> function goLastMonth(month,year,form,field) { // If the month is January, decrement the year. if(month == 1) { --year; month = 13; } document.location.href = 'http://localhost/wordpress/mysite/?month='+(month-1)+'&year='+year; } function goNextMonth(month,year,form,field) { // If the month is December, increment the year. if(month == 12) { ++year; month = 0; } document.location.href = 'http://localhost/wordpress/mysite/?month='+(month+1)+'&year='+year; } CODE: <?php $day = $_GET["day"]; $month = $_GET["month"]; $year = $_GET["year"]; if ($day == "") $day = date("j"); if ($month == "") $month = date("m"); if ($year == "") $year = date("Y"); $currentTimeStamp = strtotime("$year-$month-$day"); $monthName = date("F", $currentTimeStamp); $numDays = date("t", $currentTimeStamp); $counter = 0; ?> <body style="margin:0px 0px 0px 0px" class="body"> <table width='175' border='0' cellspacing='0' cellpadding='0' class="body"> <tr> <td width='25' colspan='1'> <input type='button' class='button' value=' < ' onClick='<?php echo "goLastMonth($month,$year)"; ?>'> </td> <td width='125' align="center" colspan='5'> <span class='title'><?php echo $monthName . " " . $year; ?></span><br> </td> <td width='25' colspan='1' align='right'> <input type='button' class='button' value=' > ' onClick='<?php echo "goNextMonth($month,$year)"; ?>'> </td> </tr> <tr> <td class='head' align="center" width='25'>S</td> <td class='head' align="center" width='25'>M</td> <td class='head' align="center" width='25'>T</td> <td class='head' align="center" width='25'>W</td> <td class='head' align="center" width='25'>T</td> <td class='head' align="center" width='25'>F</td> <td class='head' align="center" width='25'>S</td> </tr> <tr> <?php for($i = 1; $i < $numDays+1; $i++, $counter++) { $timeStamp = strtotime("$year-$month-$i"); if($i == 1) { // Workout when the first day of the month is $firstDay = date("w", $timeStamp); for($j = 0; $j < $firstDay; $j++, $counter++) echo "<td> </td>"; } if($counter % 7 == 0) echo "</tr><tr>"; if(date("w", $timeStamp) == 0) $class = "class='weekend'"; else if($i == date("d") && $month == date("m") && $year == date("Y")) $class = "class='today'"; else $class = "class='normal'"; //echo "<td class='tr' bgcolor='#ffffff' align='center' width='25'><a class='buttonbar' href='#' onclick=\"sendToForm('".sprintf("%02d/%02d/%04d", $month, $i, $year)."','$field','$form');\"><font $class>$i</font></a></td>"; echo "<td class='tr' bgcolor='#ffffff' align='center' width='25'><a id='$i $month $year' class='buttonbar' target='_blank' onmouseover=display($i,$month,$year) \"><font $class>$i</font></a></td>"; } ?> </tr> </table> </body>