The holidays are the ones currently in effect in the US-

minus Easter, which is always on a Sunday and doesn’t

need to be accounted for in your code.

Most of the code is figuring out which day of the year

is the fourth Thursday in November, and so on.

You should be able to use what you have with this to add the business days you need.

```
var Bday= {
bizDays: function(d1,d2){
d1= new Date(d1);
d2= new Date(d2);
var interval= Math.abs(d1-d2);
var days= Math.floor(interval/8.46e7);
var tem= days%7;
var weeks= Math.floor(days/7);
var temp= tem;
var wd1= d1.getDay();
var wd2= d2.getDay();
if(wd1== 6) tem-= 2;
else if(wd1== 0) tem-= 1;
if(wd2== 0) tem-= 1;
var diff= Bday.holBetween(d1,d2);
tem-= diff[0];
return weeks*5+tem;;
},
getdayOffset:function(y,wot){
var month,count,D,temp;
if(wot.length>3){
if(y< wot[3]) return false;
if(wot[4] && y >wot[4]) return false;
}
day= wot[1];
if(wot[0]== 'last'){
month= wot[2];
count= -1;
}
else{
count= wot[0]-1;
month= wot[2]-1;
}
D= new Date(y,month,1);
while(D.getDay()!= day) D.setDate(D.getDate()+1);
D.setDate((7*count)+D.getDate());
return [D.getMonth(),D.getDate()];
},
getHolidays: function(year){
year= year || new Date().getFullYear();
if(Bday.holidays['y_'+year]) return Bday.holidays['y_'+year];
var hol= [ //months are indexed by +1
['New Years Day',[1,1]],
['Independence Day',[7,4]],
['Christmas Day',[12,25]],
['Thanksgiving Day', [4,4,11]],
['Columbus Day',[2,1,10]],
['Mothers\\' Day',[2,0,5]],
['Fathers\\' Day',[3,0,6]],
['Labor Day',[1,1,9]],
['Martin Luther King Day',[3,1,1]],
['Presidents Day',[3,1,2]],
['Memorial Day',['last',1,5]],
['Veterans\\' Day',[11, 11]]
]
if(year<1796)hol= [];
else{
var I= year-1937;
if(I>0 && I%4== 0) hol.push(['Inauguration Day', [1,20]]);
}
if(year<1900)hol.splice(4);
if(year<1861)hol.splice(3);
return Bday.setHolArray(year,hol)
},
holBetween:function (d1,d2){
var A= [],tem,day,count= 0;
while(d2-d1> 0){
d1.setDate(d1.getDate()+1);
tem= d1.isHoliday();
if(!tem) continue;
A.push(tem);
day= d1.getDay();
if(day!= 0 && day!= 6)++count;
}
return [count,A];
},
holidays:{},
setHolArray: function(y,hol){
var L= hol.length;
var A= [],name,temp;
for(var i= 0; i< 12; i++) A[i]= [];
for(var i= 0; i< L; i++){
name= hol[i][0];
temp= hol[i][1];
if(!temp) continue;
if(temp.length >= 3){
temp= Bday.getdayOffset(y,temp);
}
else temp[0]-= 1;
A[temp[0]][temp[1]]= name;
}
return A;
}
}
Date.prototype.isHoliday= function(){
var y= this.getFullYear();
var ys= 'y_'+y;
if(!Bday.holidays[ys]){
Bday.holidays[ys]= Bday.getHolidays(y);
}
var hol= Bday.holidays[ys];
var m= this.getMonth();
var d= this.getDate();
if(hol[m] && hol[m][d])return hol[m][d];
return false;
}
```

//count of business days until Christmas

//pass the start date and end date arguments

//as either date objects or timestamps

var d1=new Date(2008,3,10);

var d2=Date.parse(‘12,25,2008’);

alert(Bday.bizDays(d1,d2))