Internationalization for DateTime is not working - datetime

Question

I have a demo app and the Internationalization is not working correctly.
My time code is +3 (North Cyprus). Language is TR. Date part works for TR.
but time is not working. Example instead of showing 08:27:18 it shows 05:27.18 GMT time.
More info: https://greenwichmeantime.com/time-zone/europe/turkey/
Examples: https://github.com/NTMS2017/Internationalization
Any help please?
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:intl/date_symbol_data_local.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Internationalization',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Internationalization'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
DateFormat dateFormat;
DateFormat timeFormat;
#override
void initState() {
super.initState();
initializeDateFormatting();
dateFormat = new DateFormat.yMMMMd('tr_TR');
timeFormat = new DateFormat.Hms('tr_TR');
}
void _refresh() {
setState(() {});
}
#override
Widget build(BuildContext context) {
var dateTime = new DateTime.now();
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
backgroundColor: Colors.pinkAccent,
),
body: new Center(
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Text(dateFormat.format(dateTime),
style: new TextStyle(
fontSize: 24.0,
fontWeight: FontWeight.bold,
color: Colors.pinkAccent,
),
),
new Text(timeFormat.format(dateTime),
style: new TextStyle(
fontSize: 22.0,
fontWeight: FontWeight.bold
),
),
],
),
),
floatingActionButton: new FloatingActionButton(
onPressed: _refresh,
tooltip: 'Refresh',
child: new Icon(Icons.refresh),
),
);
}
}

Answer 1

With #GünterZöchbauer help. I check my android simulator.
My Simulator is Nexus 5X API 26.
Setting the simulator Language to TR and Region to Turkey the above code works well.