Sorting by ascending date with Underscore.js

gistfile1.js

var list = [
  {id: 1, created_at: 'Sun Feb 22 23:19:08 +0000 2009'},
  {id: 2, created_at: 'Wed Jun 05 14:07:04 +0000 2013'},
  {id: 3, created_at: 'Wed Jun 05 10:11:30 +0000 2013'},
  {id: 3, created_at: 'Wed Jun 05 14:01:08 +0000 2013'}
];

var sorted = _.sortBy(list,function(node){
  return - (new Date(node.created_at).getTime());
});