It depends on your definition of week number.

See

http://www.cpearson.com/excel/weeknum.htm

--
Kind regards,

Niek Otten
Microsoft MVP - Excel


"José" wrote in message ...
| Gentlemen
| The argument type in french NO.SEMAINE help says to use 1, if the week
| begins a sunday and 2, if it begins a monday.
| I am obliged to use the reverse here to obtain a correct week number. I have
| probably missed something.
|
| Regards
| José
|
| ----------------
| This post is a suggestion for Microsoft, and Microsoft responds to the
| suggestions with the most votes. To vote for this suggestion, click the "I
| Agree" button in the message pane. If you do not see the button, follow this
| link to open the suggestion in the Microsoft Web-based Newsreader and then
| click "I Agree" in the message pane.
|
|
http://www.microsoft.com/office/comm...lic.excel.misc