According to the documentation, this option is available in BBDM using CRM, but when using RE7, it only allows you to query by Relative Calendar Year, Month, or Day.  Without this option we are forced to hard code selection queries with specific fiscal years, and to create new sets of Marketing Segments each year and fade out old ones.  It is extremely high maintenance and is driving us back to using straight SQL for these pulls instead of utilizing BBDM.