Month filter between two ranges based on user response inIDT

Hi,
I am working on SAP BO4.0.I have a requirement of creating a month filter on a date which will be between two ranges.The first range is the user response and the second range will be 6 months added to that user response.For eg:-If a user enters 1 as the response for month prompt then the date will be filtered between 1 and (1+6)=7.The database used is SAP HANA.
Please let me know if further clarifications are required.
Any help on this will be appreciated.
Thanks in advance.