Classification dates are normally maintained by the system each time you commit a Classifier.   Or when you download classifications from the IDPA website.  To change them manually, first click the Unlock Dates and Equity button.  These dates come into play when you are registering shooters for a sanctioned match.

 

Equity classifications and the shooter's classification history are illustrated in the 2015 rulebook section.  In the screen shot, the shooter has an equity classification for CDP, based on her other autoloader classifications.  But the Classified date is blank, because she has never shot a Classifier in CDP. The Equity checkbox is also read-only unless you click the unlock button.

 

 

The last Classifier appears on the main shooter list when you opt to sort by last Classifier date: