Sometime back we had reported that Windows 8 will feature new logon screen which shows system time and date.
Now you can get same thing in your Windows 7, myjuman @DA has create a small utility for Windows 7 users which put that Date and Time on your Windows 7 logon screen.
Just download the RAR file from below link and then extract it and run the EXE file and it will copy some file in system directory.
Now log off your computer and press Accesibility button or Ease Of Access button to see it.
Download via THIS LINK.
Note :- The installation might not work on 64 Bit Windows 7, and you are required to run EXE file as Administration