Thx Liron and Celambarasan ... those must be close but both returning blank.
=sum(if(MonthStart(MyDate)>=MonthStart(AddMonths(today(),-24)) AND MonthStart(MyDate)<MonthStart(AddMonths(today(),-11)),MyValue))
That works. MonthStart was my brain failure.
Just need to convert that now into Set and jobs a good'un
I like this little tool when creating complex set analysis. Just a way to help kickstart the brain
Hope that helps!