RCS keyword expansion

Hi!

I've looked and looked, but cannot figure out how to do RCS/CVS style keyword expansion with Git. The FAQ on the Wiki is quite cryptic on the subject, and my googling skills fail short.

I mainly want to have $Date$ expand in RCS/CVS manner, i.e to when the file was last changed. Possibly even have an $Id$ that gives me something useful (name and commit hash, perhaps?). Is it possible to do this? Can it be done through git-cvsserver?

I currently have my personal website in CVS and am using $Date$ to include a datestamp on the pages. I am considering converting the repository to Git, but only after I can get $Date$ expansion to work. I am considering having the website host believe it still is a cvs repository by using git-cvsserver, thus my question about expanding $Date$ through it.