$ docker run mattaudesse/cowsay:1.0 -TU -eoO `date`
______________________________
< Wed Sep 27 14:40:53 EDT 2017 >
------------------------------
\ ^__^
\ (oO)\_______
(__)\ )\/\
U ||----w |
|| ||
Uses Scott Chacon's cowsay
as a git
submodule.
Available on hub.docker.com.