calendar = new Date();
day = calendar.getDay();
month = calendar.getMonth();
date = calendar.getDate();
year = calendar.getYear();
if (year< 100) year = 1900 + year;
cent = parseInt(year/100);
g = year % 19;
k = parseInt((cent - 17)/25);
I = (cent - parseInt(cent/4) - parseInt((cent - k)/3) + 19*g + 15) % 30;
I = I - parseInt(I/28)*(1 - parseInt(I/28)*parseInt(29/(I+1))*parseInt((21-g)/11));
j = (year + parseInt(year/4) + I + 2 - cent + parseInt(cent/4)) % 7;
l = I - j;
emonth = 3 + parseInt((l + 40)/44);
edate = l + 28 - 31*parseInt((emonth/4));
emonth--;
var dayname = new Array ("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");
var monthname = 
new Array (" 1 月 "," 2 月 "," 3 月 "," 4 月 "," 5 月 "," 6 月 "," 7 月 "," 8 月 "," 9 月 "," 10 月 "," 11 月 "," 12 月 " );
document.write("<font color=FF0000>"+year +" 年 ");
document.write(monthname[month]);
document.write(date + " 日  ");
document.write(dayname[day]+" "+"</font>");

if ((month == 0) && (date == 1)) document.write("今天是元旦，新年好!");
if ((month == 4) && (date == 1)) document.write("国际劳动节");
if ((month == 5) && (date == 1)) document.write("国际儿童节");
if ((month == 9) && (date == 1)) document.write("伟大的中华人民共和国万岁");
if ((month == 11) && (date == 25)) document.write("圣诞节"); 

document.write("<br></font>");