/usr/bin/dateutils.dadd
/usr/bin/dateutils.dconv
/usr/bin/dateutils.ddiff
/usr/bin/dateutils.dgrep
/usr/bin/dateutils.dround
/usr/bin/dateutils.dseq
/usr/bin/dateutils.dsort
/usr/bin/dateutils.dtest
/usr/bin/dateutils.dzone
/usr/bin/dateutils.strptime
You may install this package on Debian with
apt-get
install dateutils