Making sure all dates are accounted for in a sequence
 

Using Excel 2002, If I have a large spreadsheet with lots of billing
data spanning 12 years is there an automated way to check for missing
months or duplicate months?

Making sure all dates are accounted for in a sequence
 

I used an IF function and it seemd to work well

wrote:
Using Excel 2002, If I have a large spreadsheet with lots of billing
data spanning 12 years is there an automated way to check for missing
months or duplicate months?