Excel SUMIF between dates

Question

I have column A with date values formatted as mm/dd/yyyy. I am trying to sum the values of column B if A >=DATE(2012,1,1) AND

=SUM(B:B) sums

Answer 1

You haven't got your SUMIF in the correct order - it needs to be range, criteria, sum range. Try:

=SUMIF(A:A,">="&DATE(2012,1,1),B:B)