Cell possibilities?

Giganews Newsgroups
Subject: Cell possibilities?
Posted by:  Boenerge
Date: Sun, 13 Jul 2008

I have a spreadsheet which has dates when people have attended a course.
The sheet then updates itself through conditional formatting and formulas to
let me know when course dates have run out.
Is it possible through using either a formula or conditional formatting that
after a certain time period e.g. two months after a course date has run out,
that the date in the cell is erased?
If so how id it done?
Thanks in advance.