How to sort an array of objects by date?

recent.sort(function(a,b) { return new Date(a.start).getTime() - new Date(b.start).getTime() } );

ES6:

recent.sort((a,b)=> new Date(b.start).getTime()-new Date(a.start).getTime());

As has been pointed out in the comments, the definition of recent isn't correct javascript.

But assuming the dates are strings:

var recent = [
    {id: 123,age :12,start: "10/17/13 13:07"}, 
    {id: 13,age :62,start: "07/30/13 16:30"}
];

then sort like this:

recent.sort(function(a,b) { 
    return new Date(a.start).getTime() - new Date(b.start).getTime() 
});

More details on sort function from W3Schools

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