`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:

http://ss

Answer 1

You could use

date "+%Y-%m-%d"

Or for a fully ISO-8601 compliant date, use one of the following formats:

date -u +"%Y-%m-%dT%H:%M:%SZ"

Output:

2011-08-27T23:22:37Z

or

date +%Y-%m-%dT%H:%M:%S%z

Output:

2011-08-27T15:22:37-0800