=SUMPRODUCT(--(WEEKDAY(A1:A10)=2))

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HTH

Bob Phillips

(remove nothere from the email address if mailing direct)

wrote in message
ups.com...
HI everyone

I am trying to sum numbers of a specific day of the week like:

sumif(a1:a10;"Monday";b1:b10)

a1:a10 contains date jj/mm/yy like 01/01/2006
b1:b10 contains numbers

I did tried to convert the range a1:a10 into weekdays but this did not
work:

sumif(text(a1:a10;"dddd");"monday";b1:b10)

Can you help me with this formula

Many thanks for your help

Nicolas