Hello, pardon me for returning to this old post, i have a similar need, and the code does work, but ordering is not. i’m trying to order by the datepicker value, but posts are ordering by the most recent publish, not the datepicker. I’m using custom post.
For example, if i publish a new post for 2011 in the datepicker, the year 2011 goes to top, so i have something like: 2011… 2015…2013… 2010… 2014.
Any clues?