US Holiday Calendar?

[nilesh.patel at bnpparibas.com]

Hi,

I was interested in the US holiday Calendar and therefore have collected 
the following information.

Holiday Calendar 
 
New Years   - 1st Jan
Martin Luther King Jr.  - 3rd Monday of January
Presidents Day  - 3rd Monday of the February


Memorial Day - Last Monday in May
Independence Day  - 4th July
Labor Day  - Last Monday of May
Columbus Day  - 2nd Monday of October
Veterans Day  - November 11
Good Friday  - 

I got the following from http://www.smart.net/~mmontes/nature1876.html
The actual origin of this algorithm appears to be by an anonymous 
correspondent from New York to Nature in 1876 (Thanks Denis!). Samuel 
Butcher, Bishop of Meath, showed that this algorithm followed from 
Delambre's analytical solutions, and produces the date of Easter for all 
years. You can see the algorithm, as well as version for Orthodox Easter 
at another Easter Date site. 
This algorithm appears in Practical Astronomy With Your Calculator, 2nd 
Edition by Peter Duffett-Smith, and he obtained this algorithm from 
Butcher's Ecclesiastical Calendar, published in 1876. This algorithm has 
also been published in the 1922 book General Astronomy by Spencer Jones; 
in The Journal of the British Astronomical Association (Vol.88, page 91, 
December 1977); and in Astronomical Algorithms (1991) by Jean Meeus. 

This algorithm holds for any year in the Gregorian Calendar, which (of 
course) means years including and after 1583. 

In the text below, / represents an integer division neglecting the 
remainder, 
while % is division keeping only the remainder. So 30/7=4 , and 30%7=2 . 

        a=year%19
        b=year/100
        c=year%100
        d=b/4
        e=b%4
        f=(b+8)/25
        g=(b-f+1)/3
        h=(19*a+b-d-g+15)%30
        i=c/4
        k=c%4
        l=(32+2*e+2*i-h-k)%7
        m=(a+11*h+22*l)/451
        Easter Month =(h+l-7*m+114)/31  [3=March, 4=April]
        p=(h+l-7*m+114)%31
        Easter Date=p+1     (date in Easter Month)

I suppose from here, you can code your holidays for a year etc.

Only thing I will say (Probably you already know) is that within HP 
powerhouse, you get a day of the week by doing the   mod(day(sysdate),7), 
which would give you numbers from 0 to 6, where zero is a Sunday.

I hope this helps.

Nilesh Patel.



Extranet
roger32909 at bellsouth.net@lists.sowder.com - 21/02/2006 15:30
 
Sent by: powerh-l-bounces+nilesh.patel=bnpparibas.com at lists.sowder.com
To:     powerh-l
cc: 
Subject:        US Holiday Calendar?


I search the archives but found nothing regarding generating a US holiday 
calendar.  I found some algorithms on the net and unless someone has 
already done it and is willing to share, I may build (and share) 
procedures for a US holiday generator for a QUICK screen.

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