function formatDate(time) {
  var t = getDate(time);
  var tf = function (i) {
    return (i < 10 ? '0' : '') + i
  };
  var year = t.getFullYear();
  var month = tf(t.getMonth() + 1);
  var day = tf(t.getDate());
  var hour = tf(t.getHours());
  var minute = tf(t.getMinutes());
  return month + '-' + day + ' ' + hour + ':' + minute;
}

function getBirthday(birthday) {
  var t = getDate(birthday);
  var tf = function (i) {
    return (i < 10 ? '0' : '') + i
  };
  var year = t.getFullYear();
  var month = tf(t.getMonth() + 1);
  var day = tf(t.getDate());
  return year + '年' + month + '月' + day + '日';
}

module.exports = {
  formatDate: formatDate,
  getBirthday: getBirthday
}