Question

printf $(date +%F) prints 2012-07-14, according to YYYY-MM-DD format date in shell script. But, how do I print 2012-07-14T16:39:57-08:00, according to HTML5 datetime?

Answer 1

$ date +%FT%T%z
2012-07-14T00:42:52-0400

I’m not sure how to get the colon in the time zone offset without using string manipulation.

$ datetime=`date +%FT%T%z`
$ printf ${datetime:0:${#datetime}-2}:${datetime:${#datetime}-2}
2012-07-14T00:42:52-04:00