`date` command on OS X doesn't have ISO 8601 `-I` option?

Question

In a Bash script, I want to print the current datetime in ISO 8601 format (preferably UTC), and it seems that this should be as simple as date -I:

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Answer 1

There's a precompiled coreutils package for Mac OS X available at:

http://rudix.org/packages-abc.html#coreutils.