I can only pull donor data for specific time periods like "Last Calendar," "Last Fiscal", "Last Quarter," etc.  I am not able to compare one quarter of one year to the same quarter of another year to easily compare performance or a Rolling 12 Months to compare time periods outside of Calendar and Fiscal.  Your system obviously has the ability to run this data but we're being blocked by the options on the drop down.  This is very frustrating and would like to see it changed.