@IDOW[date[,format]] : Returns the 3-character abbreviation for the day of the week for the specified date, in the current locale language. See date formats for information on date formats.

 

@IDOW 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)

 

Examples:

 

echo %@idow[01-01-1980]

Tue

 

echo %@idow[%_date]

Sun

 

See also: @DOW.