Hi Kevin,
Go through these documents on how to perform operation on Date InfoObject. You may not find exact solution for your requirement, but for sure it will help you to arrive solution.
This will give info on how to convert your date as KF
http://scn.sap.com/docs/DOC-31179
Some additional information on same in below doc
http://scn.sap.com/docs/DOC-27491
This document explains calculating age using date. http://scn.sap.com/docs/DOC-45143
Hope it helps! once you find a solution please share with us. It will help others.
Thanks,
Umashankar