@FILEDATE

@FILEDATE[filename[,acw]]:  Returns the date a file was last modified, in 
the default country format (mm-dd-yy for the US).  The optional second 
argument selects which date field is returned for files on an HPFS drive: 
a means the last access date, c means the creation date, and w means the 
last modification (write) date, which is the default.