如何使用php获取假期日期

例如：

1. 1月的第三个星期一，马丁·路德·金纪念日
2. 2月的第三个星期一，总统日（华盛顿诞辰日）
3. 复活节三月的最后一个星期日
4. 五月最后一个星期一为阵亡将士纪念日

我正在尝试获取这些日期，以便我可以在日历上标记它，而无需手动放置未来几年的所有内容。

修改了答案！！

$curYir = date("Y");//current year

$MLK = date('Y-m-d', strtotime("january $curYir third monday")); //marthin luthor king day
$PD = date('Y-m-d', strtotime("february $curYir third monday")); //presidents day
$Est =  date('Y-m-d', easter_date($curYir))); // easter 
$MDay = date('Y-m-d', strtotime("may $curYir first monday")); // memorial day
//("may $curYir last monday") will give you the last monday of may 1967
//much better to determine it by a loop
      $eMDay = explode("-",$MDay);
      $year = $eMDay[0];
      $month = $eMDay[1];
      $day = $eMDay[2];

      while($day <= 31){
          $day = $day + 7;
      }
      if($day > 31)
      $day = $day - 7;

      $MDay = $year.'-'.$month.'-'.$day;
$LD = date('Y-m-d', strtotime("september $curYir first monday"));  //labor day
$CD = date('Y-m-d', strtotime("october $curYir third monday")); //columbus day
$TH = date('Y-m-d', strtotime("november $curYir first thursday")); // thanks giving 
//("november $curYir last thursday") will give you the last thursday of november 1967
//much better to determine it by a loop
      $eTH = explode("-",$TH);
      $year = $eTH[0];
      $month = $eTH[1];
      $day = $eTH[2];

      while($day <= 30){
          $day = $day + 7;
      }
      if($day > 30)
      //watch out for the days in the month November only have 30
      $day = $day - 7;

      $TH = $year.'-'.$month.'-'.$day;