Abap - Activating Virtual Time Hiearchies

Allows to add hierarchy on 0DATE etc :

TRANSACTION = RSRHIERARCHYVIRT

Or

In the SAP Reference IMG, choose → BI Customizing Implementation Guide → Business Intelligence → Reporting-Relevant Settings → General Reporting-Settings → Set F4 Help and Hierarchies for Time Characteristics / OLAP Settings. 2 - Choose the Virtual Time Hierarchies tab page.

Details :http://help.sap.com/saphelp_nw70/helpdata/en/1f/83813ec8d3fe3ee10000000a114084/content.htm