How to sort a collection by date in MongoDB using Mongoose? [node.js]

I have this documents with a date field, and i am passing the DATA to my views and printing there, now i need order the data by the date, for example:

20/01/2015 Appears on top of 19/01/2015.

My schema object is:

schema = {
 name: String,
 date: String,
}

The format of the date is DAY/MONTH/YEAR.

I already try to sort, i searched before ask here, this is the actual code:

MyModel.find().sort('date').exec(function(err, result) {
    if (err) {
        console.log(err);
    }
    else {
        res.render('index', {
            data: result,
        });
    }
});

What i am doing wrong??

Thanks!!!!