Help with Dates

I need help with a date function.

I want to be able to put a date in one cell and have another cell tell
me what number week it falls in. For example if I were to input 2/12
in cell A1 then the cell next to it would tell me that 2/12 is the 6th
week of the year. I've looked through the date functions and can find
similar functions but nothing that will return the number of the week.

As each date is actually stored as a sequential number based off of
1/1/1900 I am sure there is a way to figure out the number of the
week.

If anyone out there can help I would appreciated it.

Thanks
Steve

Hi Steve,
Different places start the 1st week differently.
So if you don't get the results you want check out
Chip Pearson's site.

2004-02-12 for that date I get 7 with both
=Datenum(a25,1) and with =datenum(a25,2)
so I expect you are not in the US.

so you will have to see Chip's site: from his topic.htm to see
WEEKNUM and ISO Week Numbers
http://www.cpearson.com/excel/weeknum.htm
--
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HTH,
David McRitchie, Microsoft MVP - Excel [site changed Nov. 2001]
My Excel Pages: http://www.mvps.org/dmcritchie/excel/excel.htm
Search Page: http://www.mvps.org/dmcritchie/excel/search.htm

"SMonczka" wrote in message om...
I need help with a date function.

I want to be able to put a date in one cell and have another cell tell
me what number week it falls in. For example if I were to input 2/12
in cell A1 then the cell next to it would tell me that 2/12 is the 6th
week of the year. I've looked through the date functions and can find
similar functions but nothing that will return the number of the week.

As each date is actually stored as a sequential number based off of
1/1/1900 I am sure there is a way to figure out the number of the
week.

If anyone out there can help I would appreciated it.

Thanks
Steve

If you have the Analysis Toolpak (ATP)* installed and enabled,
perhaps try using WEEKNUM ?

For example, supposing you have dates in col A,
you could pickup the week # in col B by putting:

In B1: =weeknum(A1,2)
and copying down col B

The 2nd arg in WEEKNUM, e.g.: "2" in B1 above,
is a number that determines on what day the week begins.
"2" means the week begins on Monday.
The default is "1" - week begins on Sunday.

--
*Check the "Analysis Toolpak" box via Tools Add-Ins
Chip Pearson's page has details on the ATP at:
http://www.cpearson.com/excel/ATP.htm

--
Rgds
Max
xl 97
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"SMonczka" wrote in message
om...
I need help with a date function.

I want to be able to put a date in one cell and have another cell tell
me what number week it falls in. For example if I were to input 2/12
in cell A1 then the cell next to it would tell me that 2/12 is the 6th
week of the year. I've looked through the date functions and can find
similar functions but nothing that will return the number of the week.

As each date is actually stored as a sequential number based off of
1/1/1900 I am sure there is a way to figure out the number of the
week.

If anyone out there can help I would appreciated it.

Thanks
Steve