Condition Based YTD Calcualtion In the report.

Hi Folks,

Report Runs on by Default report runs based on  YTD is from Jan- Dec.

Requirements are :

if the Reporting Month is February or March, Criteria Month should be defaulted to December of the previous year.

Ex: Current Date is Mar-20-2015

Report need to run from previous year Dec to till current date( 01-dec-2014 to mar-20-2015)

Kindly suggest me how to achieve this results in the report level.

Thanks in adv.

Ram

System: 3.1 SP5 webi