JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="test">
    <li id="2014-05-15 10:00">blub</li>
    <li id="2014-05-16 10:00">blaaah</li>
    <li id="2014-05-15 09:00">hmmmm</li>
    <li id="2014-05-16 09:00">one more</li>
</ul>

JavaScript

$(function(){
    var elems = $('#test').children('li').remove();
    elems.sort(function(a,b){
        return (new Date(a.id) > new Date(b.id));
    });
    $('#test').append(elems);
});