<?php
function monat() {
$Timestamp = mktime (0, 0, 0, $_GET['Month12'], 1, $_GET['Year']);
$MonthName  =  date("F", $Timestamp);
$YearName = date("Y", $Timestamp);
switch ($MonthName)  {
case "January" : $MonthName = "Januar"; break;
case "February" : $MonthName = "Februar"; break;
case "March" : $MonthName = "M&auml;rz"; break;
case "May" : $MonthName = "Mai"; break;
case "June" : $MonthName = "Juni"; break;
case "July" : $MonthName = "Juli"; break;
case "October" : $MonthName = "Oktober"; break;
case "December" : $MonthName = "Dezember"; break;
}
print ("<td><table><tr><td>");
print ("<table border=0 cellpadding=3 cellspacing=0 align=center><tr><td>");

$MonthStart = date("w", $Timestamp);
if ($MonthStart == 0) { 	$MonthStart = 7;  }
$LastDay = date("d", mktime (0, 0, 0, $_GET['Month12']+1, 0, $_GET['Year']));
$StartDate = 1 - $MonthStart;
for ($k = 1; $k <= 6; $k++) { // 6 Zeilen
  print ("<tr bgcolor=white>");
  for ($i = 1; $i <= 7; $i++) { // 7 Spalten
   $StartDate++;
   if (($StartDate <= 0) || ($StartDate > $LastDay)) {
    print ("<td class=tr3>&nbsp</td>");
   } elseif (($StartDate >= 1) && ($StartDate <= $LastDay)) {
                         $monthlink = $_GET[Month12];
                         if (($StartDate == $_GET[Day]) && (date("m", $Timestamp) == $_GET[Month]) && (date("Y", $Timestamp) == $_GET[Year]))  {
                         print ("<td align=center><b>$StartDate</b>");
                         }  ELSE  {
                         while ($monthlink > 12)  {
                         $monthlink = $monthlink - 12;
                         }
                         print ("<td align=center><a href=\"http://xyz.de/DEINEformularseite?Tag=$StartDate&Monat=$monthlink&Jahr=$YearName\">$StartDate</a>");
                         }
                         print ("</td>");
   }
  }
  print ("</tr>\n");
}
print ("</table>\n");
print ("</td></tr></table>");
print ("</td></tr></table></td>");
}

for ($i = 1; $i <= 4; $i++) { // vier Monate je Zeile
$_GET['Month12'] = $_GET['Month12'] + 1; monat();  }
print ("</tr>");
}

if (!$_GET['Year']) { $_GET['Year'] = date ("Y"); }
print ("<table>");
$_GET['Month12'] = 0;
for ($i = 1; $i <= 4; $i++) { monatsblock();  }  // vier mal den Monatsblock jeweils mit der
                                                 // dort eingestellten Anzahl Monaten je Zeile
print ("</table>");
?>