Date.prototype.toISOString()
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const event = new Date("05 October 2011 14:48 UTC");
console.log(event.toString());
// Expected output: "Wed Oct 05 2011 16:48:00 GMT+0200 (CEST)"
// Note: your timezone may vary
console.log(event.toISOString());
// Expected output: "2011-10-05T14:48:00.000Z"
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dateObj.toISOString()
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const d = new Date(0);
console.log(d.toISOString()); // "1970-01-01T00:00:00.000Z"
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| ECMAScript® 2027 Language Specification # sec-date.prototype.toisostring |