SOURCE

moment.locale('zh-cn');

let arr = [
  {
    Diarys: [
      {
        content: '',
        Time: '2019-08-09 09:20:00'
      }
    ]
  }
]

function toDouble(n) {
  return n < 10 ? '0' + n : '' + n;
}

arr.forEach(item => {
  item.Diarys.forEach(it => {
    let formatTime = moment(it.Time).format('MMMM Do YYYY, h:mm:ss a');
    it.diyMonth = formatTime.split(' ')[0]
    it.diyDate = toDouble(new Date(it.Time).getDate());
    it.diyTime = it.Time.split(' ')[1].split(':')[0] + ':' + it.Time.split(' ')[1].split(':')[1]
  })
})

<script src="http://momentjs.cn/downloads/moment-with-locales.js"></script>