Archive for a specific period of time

I work in an educational institution where our documents are strongly tied to a particular school year and particular months. For example, we have summer sessions and winter sessions. The summer session for the year 2003 would run from May to August 2003, but the summer session would run from September 2004 to April 2005…

I would like to define an archive policy around our schedule, i.e., “Summer Session 2003”, but everything I see under defining an archive policy seems to be based on relative dates - is there anyway to define an absolute set of dates for an archive policy?