ng-datepicker.js

gistfile1.js

(function() {
	'use strict';

	module.exports = ['$filter', function($filter){
		return {
			restrict: 'A',
			link: function(scope, elem, attr) {
				var options = {
					field: elem[0]
				};
				if(attr.ngDatePicker) {
					angular.extend(options, scope[attr.ngDatePicker]);
				}
				var picker = new Pikaday(options);

				elem.on('change', function(){
					elem.val($filter('date')(elem.val(), 'dd/MM/yyyy'));
				});
			}
		};
	}];
})();

$scope.pickerOptions = {
	maxDate: new Date()
};

<input class="input date-input" name="date" type="text" placeholder="Data Início" ng-model="filterInit" ng-date-picker="pickerOptions">