How Can I Convert a Date to a Different Time Zone in JavaScript?

Convert Date to Another Time Zone in JavaScript

To convert a date from one time zone to another in JavaScript, you can utilize the built-in functions and the time zone database described in the Zone.tab file. Here's a practical solution:

The convertTZ function takes two parameters:

• date: The original date in a specific time zone (e.g., "2012/04/10 10:10:30 0000")
• tzString: The desired time zone string (e.g., "Asia/Jakarta")

function convertTZ(date, tzString) {
    return new Date((typeof date === "string" ? new Date(date) : date).toLocaleString("en-US", {timeZone: tzString}));   
}

Example usage:

// Convert a date to GMT+7 timezone (Asia/Jakarta)
const convertedDate = convertTZ("2012/04/20 10:10:30 +0000", "Asia/Jakarta");
console.log(convertedDate); // Tue Apr 20 2012 17:10:30 GMT+0700 (Western Indonesia Time)

The convertedDate will be a regular Date object, allowing you to access its components:

const hours = convertedDate.getHours(); // 17

Additionally, you can pass a Date object as the first argument instead of a string:

const date = new Date();
const jakartaDate = convertTZ(date, "Asia/Jakarta"); // Current date-time in Jakarta

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