mv print.log date.log

Simple one if you know unix... I need to mv a log file to another file on a daily basis. So I would like to automaticly rename the file to today's date and this needs to be done every workday. Problems are: I don't know if I can set mv to change the filename to a date (e.g. 010103.log) and I don't know cron... If anybody can help out, I would be gratefull...