PikaDay com formato pt-BR

usando moment.js como dependencia, formata a string de data em dd/mm/yyyy

HTML

<script src="https://cdn.rawgit.com/moment/moment/develop/moment.js"></script>
<script src="https://cdn.rawgit.com/dbushell/Pikaday/master/plugins/pikaday.jquery.js"></script>
<link rel="stylesheet" href="https://cdn.rawgit.com/dbushell/Pikaday/master/css/pikaday.css">
<script src="https://cdn.rawgit.com/dbushell/Pikaday/master/pikaday.js"></script>
<label for="picker">dd/mm/yyyy</label>
<input type="text" data-calendar data-pikaday-locale="pt-br" id="picker" class="pikaday">

JavaScript

var $datePicker = $('[data-calendar]')[0];
var dataLocale = $('[data-calendar]').data('pikaday-locale');

$.getJSON('https://api.myjson.com/bins/1bazm', function (i18n) {
    var picker = new Pikaday({
        field: $datePicker,
        format: 'DD/MM/YYYY',
        i18n: i18n.langs["en-us"]
    })
});