Need some tips on programming to find "week of the year"

[rml]

I need to find out what week of the year when someone give me a particular date

For example: January 13,2003 is in the 3rd week of 2003



Any idea? Any existing program/logic out there?

thanks in advance

 

[pkananen]

its all about the doomsday algorithm. search and ye will find.

 

[jonmullen]

What language, if you are using PHP you can just use the date function $week = date("W"); perl has something simmilar that I know off too. I think it is "$week = strftime "%W", localtime;"

 

[notfred]

here

 

[Barnaby W. Füi]

strftime is a pretty standard function, it was in C long before anything else. It's in python and perl and probably many others.

 

[RichieZ]

what is this an APCS question? I remember having to do that