I have two worksheets. First has values and dates when entered.
eg, 123 1/1/2008
234 15/1/2008
456 3/2/2008
654 7/2/2008
876 16/4/2008

Second has month headings:- January Febuary........

What i want to do is sumif(ws1!date column,ws2!column header,ws1!values)
Hope this is clear! i tried using MONTH with no luck