The ability to designate a field element as a Report search criteria had always existed in Enterprise Forms.  In earlier versions of Enterprise Forms searches on Date type field elements are performed with an Equal operator.  Therefore it is possible to only perform search on a single date.  In version 05.00.00 of Enterprise Forms the ability to search on a date range is now available for newly created reports.  Existing reports will still utilize the single date search technique.  To utilize the new date range feature the Report will need to be regenerated.

The above image shows a date type field (Date Of Birth) with searchable date range available in the Report Search Fields of the Manage Report Settings screen

The above image shows a date type field (Date Of Birth) with searchable date range available in the main Report Listing screen.  in addition data range search is also available from the Workflow Search screen as shown below

Image showing the inline calendar upon click on the Calendar image button