Fixed "invalid option" on date and stat

date: invalid option -- 'j'
stat: invalid option -- 's'

I can't find these option on Ubuntu 14.04, nor in any man page (GNU coreutils):
http://unixhelp.ed.ac.uk/CGI/man-cgi?date
http://unixhelp.ed.ac.uk/CGI/man-cgi?stat