datefilter.js

app.filter('daterange', function () {
	return function(items, date_field,start_date, end_date) {
		var result = [];

		// date filters
		var start_date = (start_date && !isNaN(Date.parse(start_date))) ? Date.parse(start_date) : 0;
		var end_date = (end_date && !isNaN(Date.parse(end_date))) ? Date.parse(end_date) : new Date().getTime();

		// if the items are loaded
		if (items && items.length > 0) {
			angular.forEach(items, function (index, item) {
				var itemDate = new Date(item['date_field']);

				if (itemDate >= start_date && itemDate <= end_date) {
					result.push(item);
				}
			});

			return result;
		}
	};
});

Just a note, in line 11, with function (index, item) it should be function(item, index).
https://docs.angularjs.org/api/ng/function/angular.forEach
angular.forEach(values, function(value, key))