guess timezone name using javascript

Question

I'm working on React app, I want to detect timezone like this format "Africa/Bangui", but it return it as 'Etc/GMT-1', I know it's my machine problem, since I tried the other browsers.

I tried:

• Intl.DateTimeFormat().resolvedOptions().timeZone;
• dayjs guess
• moment guess

all return the some format: "Etc/GMT-1" How can fix this, and take i consideration other clients that have the problem (in their system) I want always this format "Africa/Bangui"

Answer 1

use moment timezone https://momentjs.com/timezone/docs/

moment.tz.guess(); // America/Chicago
// suppose the client's timezone changes to Europe/Berlin
moment.tz.guess(); // America/Chicago
moment.tz.guess(true); // Europe/Berlin
moment.tz.guess(); // Europe/Berlin

Answer 2

const dateTimeFormat = new Intl.DateTimeFormat('en-US');
const resolvedOptions = dateTimeFormat.resolvedOptions();
const timeZone = resolvedOptions.timeZone;

console.log(timeZone); // 'Asia/Calcutta'

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