@DOW[date[,format]] : Returns the first three characters of the English name of the day of the week for the specified date ("Mon", "Tue", "Wed", etc.). See date formats for information on acceptable date formats.

 

@DOW accepts an optional second parameter specifying the date format:

 

0default
1USA (mm/dd/yy)
2Europe (dd/mm/yy)
3Japan (yy/mm/dd)
4ISO (yyyy-mm-dd)
5ISO 8601 yyyy-Www-d
6ISO 8601 yyyy-ddd

 

Examples:

 

echo %@dow[01-01-1980]

Tue

 

echo %@dow[%_date]

Sun

 

See also: @IDOW.