wp-cli/wp-cli — pull request #1392 by danielbachhuber (2014-09-11 23:41:33+00:00)
Title: commands/cron/event/schedule/ wrong example

http://wp-cli.org/commands/cron/event/schedule/

Shows this example:
wp cron event schedule cron_test

But it only returns:
Error: '' is not a valid datetime.

I guess it's working as expected but the documentation should be updated?