$date
From Scriptwiki
Returns the current date in day/month/year format.
$date
See Time and Date Identifiers for full list of possible formats.
Note that you can use $adate to get the current date in US format.
Example
echo -a $date
This would e.g. echo 26/11/2005 to the active window.
echo -a $date(HH:nn)
This would e.g. echo 19:20 to the active window (19 o'clock and 20 minutes).