Autologin in Linux mint 13 -Enable / Disable

Enabling/disabling autologin has become very easy in  Linux mint 13.
Here are the steps::
Menu>Preferences>User Accounts>Unlock>Automatic Login>ON/OFF

get day of the week in linux for a specific date

and the command goes like

rahul $ date -d 20121212 "+%A" 

Wednesday

another 

rahul$ date -d 20121213 "+%A" 

Thursday

date is in YYYYMMDD form