Has anyone figured out how to do quarters in reports?   I'd like to see forecasted revenue shown per quarters.  There really is no good way to do by month either unless you make close date on opportunities always be last day of month -- which is what I do.  Maybe I haven't figured out the grouping in reports fully?  Or is it just not possible?

Zoho CRM reports and reporting system don't seem to have an interval concept so that you can make the interval for whatever duration you want -- day, week, month, quarter, year,... Am I wrong?