[2012-10-30 01:44 UTC] tcarter at noggin dot com dot au

Description:
------------
PHP timelib calculates the day of the week incorrectly for dates prior to the 1st of January 1600.


Test script:
---------------
<?php

  ini_set('date.timezone', 'UTC');

  print "Date         PHP   OS\n";
  print "----------   ---   ---\n";
  $dates = array('1599-12-30', '1599-12-31', '1600-01-01', '1600-01-02');
  foreach ($dates as $date) {
    print strftime(
      "%Y-%m-%d   %a   ",
       strtotime($date)
    ) . `env TZ=UTC date --date=$date +%a`;
   }
?>


Expected result:
----------------
Date         PHP   OS
----------   ---   ---
1599-12-30   Thu   Thu
1599-12-31   Fri   Fri
1600-01-01   Sat   Sat
1600-01-02   Sun   Sun

Actual result:
--------------
Date         PHP   OS
----------   ---   ---
1599-12-30   Fri   Thu
1599-12-31   Sat   Fri
1600-01-01   Sat   Sat
1600-01-02   Sun   Sun