Sort news in Android listview according to date in "dd/MM/yyyy HH:mm" format in Firebase

I have data in Firebase with the following format in the picture as you see. I want to sort it according to date (newsDate) in descending order (latest on the top). I have added this to my code while I am retrieving data from Firebase: [login to view URL]("newsDate").addChildEventListener(new ChildEventListener() { // on child added methods } But this only does string sorting, so that order becomes like this: 04/08/2018 12:00, 13/08/2018 10:30, 30/07/2018 00:00 I know this is because of alphabetical sorting. Wondering how I can customize the sorting order with my date format (dd/MM/yyyy HH:mm) and also in descending order? Please note that I cannot change property of newsDate in Firebase to Timestamp or Millis.