Function Module Required

Hi

I have to convert the Date(Select-Options) filed to display in ALV in Month format.

The date can be in range or current date,accoring to the user.Can you tell me if any FM exit there in SAP or plz tell me the code, than it will be a great help.

Even I have to display it in ALV format,according to the PO done in each month.Give me some hint for this also.

Your kind help will be highly appriciated.

Regards

Vipin