today=new Date();

function initArray(){

  this.length=initArray.arguments.length

  for(var i=0;i<this.length;i++)

  this[i+1]=initArray.arguments[i] }

  var d=new initArray(

   "星期日",

   "星期一",

   "星期二",

   "星期三",

   "星期四",

   "星期五",

   "星期六");

document.write(today.getFullYear(),"年",today.getMonth()+1,"月",today.getDate(),"日 ",d[today.getDay()+1]," ");

calendar = new Date();

month = calendar.getMonth();

date = calendar.getDate();

if ((month == 0) && (date == 1)) document.write("元旦");

if ((month == 2) && (date == 12)) document.write("植树节");

if ((month == 3) && (date == 5)) document.write("清明节");

if ((month == 4) && (date == 1)) document.write("国际劳动节");

if ((month == 4) && (date == 4)) document.write("青年节");

if ((month == 5) && (date == 1)) document.write("国际儿童节");

if ((month == 7) && (date == 1)) document.write("建军节");

if ((month == 7) && (date == 16)) document.write("七夕情人节");

if ((month == 9) && (date == 1)) document.write("国庆节/国际音乐节/国际老人节");

if ((month == 11) && (date == 24)) document.write("平安夜");

if ((month == 11) && (date == 25)) document.write("圣诞节");

/*农历部分*/

var CalendarData=new Array(100);

var madd=new Array(12);

var tgString="甲乙丙丁戊己庚辛壬癸";

var dzString="子丑寅卯辰巳午未申酉戌亥";

var numString="一二三四五六七八九十";

var monString="正二三四五六七八九十冬腊";

var weekString="日一二三四五六";

var sx="鼠牛虎兔龙蛇马羊猴鸡狗猪";

var cYear,cMonth,cDay,TheDate;

CalendarData = new Array(0xA4B,0x5164B,0x6A5,0x6D4,0x415B5,0x2B6,0x957,0x2092F,0x497,0x60C96,0xD4A,0xEA5,0x50DA9,0x5AD,0x2B6,0x3126E, 0x92E,0x7192D,0xC95,0xD4A,0x61B4A,0xB55,0x56A,0x4155B, 0x25D,0x92D,0x2192B,0xA95,0x71695,0x6CA,0xB55,0x50AB5,0x4DA,0xA5B,0x30A57,0x52B,0x8152A,0xE95,0x6AA,0x615AA,0xAB5,0x4B6,0x414AE,0xA57,0x526,0x31D26,0xD95,0x70B55,0x56A,0x96D,0x5095D,0x4AD,0xA4D,0x41A4D,0xD25,0x81AA5,0xB54,0xB6A,0x612DA,0x95B,0x49B,0x41497,0xA4B,0xA164B, 0x6A5,0x6D4,0x615B4,0xAB6,0x957,0x5092F,0x497,0x64B, 0x30D4A,0xEA5,0x80D65,0x5AC,0xAB6,0x5126D,0x92E,0xC96,0x41A95,0xD4A,0xDA5,0x20B55,0x56A,0x7155B,0x25D,0x92D,0x5192B,0xA95,0xB4A,0x416AA,0xAD5,0x90AB5,0x4BA,0xA5B, 0x60A57,0x52B,0xA93,0x40E95);

madd[0]=0;

madd[1]=31;

madd[2]=59;

madd[3]=90;

madd[4]=120;

madd[5]=151;

madd[6]=181;

madd[7]=212;

madd[8]=243;

madd[9]=273;

madd[10]=304;

madd[11]=334;

function GetBit(m,n){

return (m>>n)&1;

}

function e2c(){

TheDate= (arguments.length!=3) ? new Date() : new Date(arguments[0],arguments[1],arguments[2]);

var total,m,n,k;

var isEnd=false;

var tmp=TheDate.getYear();

if(tmp<1900){

  tmp+=1900;

}

total=(tmp-1921)*365+Math.floor((tmp-1921)/4)+madd[TheDate.getMonth()]+TheDate.getDate()-38;

if(TheDate.getYear()%4==0&&TheDate.getMonth()>1) {

  total++;

}

for(m=0;;m++){

  k=(CalendarData[m]<0xfff)?11:12;

  for(n=k;n>=0;n--){

  if(total<=29+GetBit(CalendarData[m],n)){

   isEnd=true; break;

  }

  total=total-29-GetBit(CalendarData[m],n);

  }

  if(isEnd) break;

}

cYear=1921 + m;

cMonth=k-n+1;

cDay=total;

if(k==12){

  if(cMonth==Math.floor(CalendarData[m]/0x10000)+1){

  cMonth=1-cMonth;

  }

  if(cMonth>Math.floor(CalendarData[m]/0x10000)+1){

  cMonth--;

  }

}

}

function GetcDateString(){

var tmp="";

tmp+=tgString.charAt((cYear-4)%10);

tmp+=dzString.charAt((cYear-4)%12);

tmp+="(";

tmp+=sx.charAt((cYear-4)%12);

tmp+=")年 ";

if(cMonth<1){

  tmp+="(闰)";

  tmp+=monString.charAt(-cMonth-1);

}else{

  tmp+=monString.charAt(cMonth-1);

}

tmp+="月";

tmp+=(cDay<11)?"初":((cDay<20)?"十":((cDay<30)?"廿":"三十"));

if (cDay%10!=0||cDay==10){

  tmp+=numString.charAt((cDay-1)%10);

}

return tmp;

}

function GetLunarDay(solarYear,solarMonth,solarDay){

//solarYear = solarYear<1900?(1900+solarYear):solarYear;

if(solarYear<1921 || solarYear>2020){

return "";

}else{

  solarMonth = (parseInt(solarMonth)>0) ? (solarMonth-1) : 11;

  e2c(solarYear,solarMonth,solarDay);

  return GetcDateString();

}

}

var D=new Date();

var yy=D.getFullYear();

var mm=D.getMonth()+1;

var dd=D.getDate();

var ww=D.getDay();

var ss=parseInt(D.getTime() / 1000);

if (yy<100) yy="19"+yy;

function showCal(){

document.write(GetLunarDay(yy,mm,dd));

}

showCal();

<script type="text/JavaScript" src="navCal.js"></script>