JSFiddle - React, Tailwind, and code Playground

JavaScript

var concerts = [];
var concert={performer: 'sep', 
             date: 'September 31, 2015'};
concerts.push(concert);

concert={performer: 'may',
                     date:'May 31, 2015'};
concerts.push(concert);

sortedConcerts = concerts.sort(sortConcerts);

function sortConcerts(a, b){
var firstConcert=new Date(a.date);
var secondConcert=new Date(b.date);
return firstConcert-secondConcert;
}

$.each(concerts, function(index, item){
    console.log(item.performer);
});