通过前面的工作，我们已经可以比较完整的使用这个组件了，但对于这个组件来说，还有一点小小的遗憾，我希望这个组件看起来和我们日常的日历没什么不一样，至少他要显示阴历， 来看看怎么加入吧。

怎么算当前日期的阴历，呵呵我也不会，不过还好，原来下过一个用PHP编写的返回给定日期阴历的类，就把他给用上去吧。这个类代码如下(感谢原作者放出这个类，我从网上下的时，里面已经没有作者信息了)：

 
/**
* 农历类
*/
class Lunar {
  var $year;
  var $month;
  var $day;
  var $isLeap;
  var $yearCyl;
  var $dayCyl;
  var $monCyl;
  var $time;
  var $lunarInfo = array(
    0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,
    0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,
    0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,
    0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,
    0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,
    0x06ca0,0x0b550,0x15355,0x04da0,0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,
    0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,
    0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b5a0,0x195a6,
    0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,
    0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,0x092e0,
    0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,
    0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,
    0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,
    0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,
    0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0,
    0x14b63);
 
  /**
   * 传回农历 y年的总天数
   */
  function lYearDays($y) {
    $sum = 348;
    for($i=0x8000; $i>0x8; $i>>=1)
      $sum += ($this->lunarInfo[$y-1900] & $i)? 1: 0;
    return $sum+$this->leapDays($y);
  }
  /**
   * 传回农历 y年闰月的天数
   */
  function leapDays($y) {
    if($this->leapMonth($y))
      return ($this->lunarInfo[$y-1900] & 0x10000)? 30: 29;
    else return 0;
  }
  /**
   * 传回农历 y年闰哪个月 1-12 , 没闰传回 0
   */
  function leapMonth($y) {
    return $this->lunarInfo[$y-1900] & 0xf;
  }
  /**
   * 传回农历 y年m月的总天数
   */
  function monthDays($y,$m) {
    return ($this->lunarInfo[$y-1900] & (0x10000>>$m))? 30: 29;
  }
  /**
   * 创建农历日期对象
   */
  function Lunar($objDate,$month=1,$day=1) {
    $leap=0;
    $temp=0;
    if(is_object($objDate))
      $this->time = mktime(0,0,0,$objDate->getMonth(),$objDate->getDate(),$objDate->getYear());
    else {
      $year = $objDate;
      $this->time = mktime(0,0,0,$month,$day,$year);
      if($year < 1970) {
        return;
        $temp = 0;
        for($i=1970; $i>$year; $i--) {
          $temp = $this->lYearDays($i);
          $offset -= $temp;
        }
      }
    }
    $offset = round($this->time/86400+25537);
 
    $this->dayCyl = $offset + 40;
    $this->monCyl = 14;
 
    for($i=1900; $i<$year && $offset>0; $i++) {
      $temp = $this->lYearDays($i);
      $offset -= $temp;
      $this->monCyl += 12;
    }
 
    if($offset<0) {
      $offset += $temp;
      $i--;
      $this->monCyl -= 12;
    }
 
    $this->year = $i;
    $this->yearCyl = $i-1864;
    $leap = $this->leapMonth($i); //闰哪个月
 
    $this->isLeap = false;
    for($i=1; $i<13 && $offset>0; $i++) {
      //闰月
      if($leap>0 && $i==($leap+1) && $this->isLeap==false) {
        $i--;
        $this->isLeap = true;
        $temp = $this->leapDays($this->year);
      }else {
        $temp = $this->monthDays($this->year, $i);
      }
 
      //解除闰月
      if($this->isLeap==true && $i==($leap+1))
        $this->isLeap = false;
 
      $offset -= $temp;
      if($this->isLeap == false)
        $this->monCyl ++;
    }
 
    if($offset==0 && $leap>0 && $i==$leap+1)
      if($this->isLeap)
        $this->isLeap = false;
      else {
        $this->isLeap = true;
        $i--;
        $this->monCyl--;
      }
 
    if($offset<0) {
      $offset += $temp;
      $i--;
      $this->monCyl--;
    }
 
    $this->month = $i;
    $this->day = $offset + 1;
  }
 
  function cyclical($num) {
    $Gan = Array("甲","乙","丙","丁","戊","己","庚","辛","壬","癸");
    $Zhi = Array("子(鼠)","丑(牛)","寅(虎)","卯(兔)",
"辰(龙)","巳(蛇)","午(马)","未(羊)","申(猴)","酉(鸡)","戌(狗)","亥(猪)");
    return $Gan[$num%10].$Zhi[$num%12];
  }
  /**
   * 输出，根据需要直接修改本函数或在派生类中重写本函数
   */
  function display_day() {
    $nStr = array(' ','正','二','三','四','五','六',
'七','八','九','十','十一','腊');
 
    $nl= sprintf("%s%s月%s",($this->isLeap?"闰":""),$nStr[$this->month],$this->cDay($this->day));
 
        return $nl;
  }
   
  /**
   * 中文日期
   */
  function cDay($d) {
    $nStr1 = array('日','一','二','三','四','五','六','七','八','九','十');
    $nStr2 = array('初','十','廿','卅','　');
 
    switch($d) {
      case 10:
        $s = '初十';
        break;
      case 20:
        $s = '二十';
        break;
      case 30:
        $s = '三十';
        break;
      default :
        $s = $nStr2[floor($d/10)];
        $s .= $nStr1[$d%10];
    }
    return $s;
  }
}  // 农历类定义结束
 

使用非常简单：

 
 $dl=new Lunar(年,月,日);//你要转换的日期
$kk=$dl->display_day();//返回的是阴历日期一个字符串

用这个类在ExtCalendar组件中你要输出阴历的位置 加个echo语句，或者和原来的日期就是加一下就行了。 

其实我认为Joomla最大的好处，是你能够看到源程序，可以按自己的要求来定制程序，象ExtCalendar做出来之后，自己就感觉有酷。
感谢网上which做的汉化文件，感谢joomla感谢ExtCalendar，呵呵感谢所有的开源作者。看了上面的文章之后你应该也可以把ExtCalendar组件做的比较好了吧。