How to convert DateTime into different timezones?

Question

How to convert DateTime into different timezones? The DateTime class has two methods .toLocal() and .toUtc(). But if I want to display time in another time zone. How can I d

Answer 1

You can use TimeZoneInfo.ConvertTime() to change timezone. Try like this

DateTime hwTime = new DateTime(2007, 02, 01, 08, 00, 00);
try {
    TimeZoneInfo hwZone = TimeZoneInfo.FindSystemTimeZoneById("Hawaiian Standard Time");
    TimeZoneInfo.ConvertTime(hwTime, hwZone, TimeZoneInfo.Local));
}
catch (TimeZoneNotFoundException) {
    Console.WriteLine("Timezone not found");
}                           
catch (InvalidTimeZoneException) {
    Console.WriteLine("Invalid Timezone");
}

This will convert from Hawaiian Standard Time to Local.

It is just an example. Use it to convert as per your need.

Answer 2

DateTime doesn't contain timezone information therefore you can't create a DateTime in a specific timezone only the timezone of your system and UTC are available.

You can wrap the DateTime in a custom class and add timezone information to the wrapper. You also need a table of offsets for each timezone and then add/substract the offset from the UTC date.

Answer 3

I wrote a package for this. It's called Instant, and it can convert a DateTime in any given timezone worldwide. Take a detailed look at https://aditya-kishore.gitbook.io/instant/

The basic usage for converting a DateTime to a timezone is very simple:

//Assumes Instant is in your pubspec
import 'package:instant/instant.dart';

//Super Simple!
DateTime myDT = DateTime.now(); //Current DateTime
DateTime EastCoast = dateTimeToZone(zone: "EST", datetime: myDT); //DateTime in EST zone
return EastCoast;

This works with one line of code and minimal hassle.

Answer 4

import 'package:timezone/timezone.dart'

String locationLocal = await FlutterNativeTimezone.getLocalTimezone();

//Esta Função recebe uma data/hora e converte para data/hora local.
TZDateTime convertFireBaseToLocal(TZDateTime tzDateTime, String locationLocal) {
      TZDateTime nowLocal = new TZDateTime.now(getLocation(locationLocal));
      int difference = nowLocal.timeZoneOffset.inHours;
      TZDateTime newTzDateTime;
      newTzDateTime = tzDateTime.add(Duration(hours: difference));
      return newTzDateTime;
}