Flexible quarterly start calc

[rivet]

if the user can select which month is the first of the fiscal year. How can you determine what quarter the rest of the months sit in?

I have a global field with the month number in it, so let say it is 9 (September).

[BobWeaver]

Int(Mod(12+nMonth-FiscalStartMonth,12)/3)+1

where nMonth is the month (1..12) that you want to find which quarter it belongs in.