It also makes use of the Intl API, so you can be confident of its results. To use the packageWhen you load the page, it shows you your current timezone. Create a index.html file and open the file in a browser. Copy the above code into the file and save it. Then refresh the browser tab you just opened. Cool right? MomentTz uses Intl API which is a built-in JavaScript internationalization API. It also has its data bank it checks the result of the Intl API against to provide more accurate information. It also requires you to have included Moment.js before it can work.\nJstz package\n\nJstz is a simple lighter package for detecting timezone. I say lighter in comparison with Moment.js. It also makes use of the Intl API, so you can be confident of its results. To use the package, you can grab the CDN as follows:\n\n\n\n\n\nWhat you can notice from these libraries used for detecting timezone is that they do not require any network calls from your end. This means if you intend to only pick user timezones, you may not need to do IP lookups. And that’s good because they can get expensive as you’re paying for every call to the API.\nIntl API itself\n\nDon’t hate me, but let’s face it, if I showed you this, you may have ignored the rest of this article lol.\n\nOk, so here is how to use it:\n\n\n\n\nBefore you go like “Wow!!!”, understand that the packages highlighted above take a lot into consideration when detecting timezones. This makes them slightly more accurate than Intl API alone. You may never notice the difference, but it feels good knowing someone’s got your back.\nMagic App\n\n“Talk is cheap. Show me the code.” or so the saying goes. Let’s go one better and build a really simple app that detects a user’s location and time zone information, and tell them what the time would be like in three other time zones around the world.