Temporal.Instant.fromEpochNanoseconds()

The Temporal.Instant.fromEpochNanoseconds() static method creates a new Temporal.Instant object from the number of nanoseconds since the Unix epoch (midnight at the beginning of January 1, 1970, UTC).

To convert a {{jsxref("Date")}} object to a Temporal.Instant object, use {{jsxref("Date.prototype.toTemporalInstant()")}} instead.

Syntax#

Temporal.Instant.fromEpochNanoseconds(epochNanoseconds)

Parameters#

• epochNanoseconds
• : A BigInt representing the number of nanoseconds since the Unix epoch.

Return value#

A new Temporal.Instant object representing the instant in time specified by epochNanoseconds.

Exceptions#

• {{jsxref("RangeError")}}
• : Thrown if epochNanoseconds is not in the representable range, which is ±10⁸ days, or about ±273,972.6 years, from the Unix epoch.

Examples#

Using Temporal.Instant.fromEpochNanoseconds()#

const instant = Temporal.Instant.fromEpochNanoseconds(0n);
console.log(instant.toString()); // 1970-01-01T00:00:00Z
const vostok1Liftoff =
  Temporal.Instant.fromEpochNanoseconds(-275248380000000000n);
console.log(vostok1Liftoff.toString()); // 1961-04-12T06:07:00Z
const sts1Liftoff = Temporal.Instant.fromEpochNanoseconds(355924804000000000n);
console.log(sts1Liftoff.toString()); // 1981-04-12T12:00:04Z

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("Temporal.Instant")}}
• {{jsxref("Temporal/Instant/epochNanoseconds", "Temporal.Instant.prototype.epochNanoseconds")}}
• {{jsxref("Temporal/Instant/from", "Temporal.Instant.from()")}}
• {{jsxref("Temporal/Instant/fromEpochMilliseconds", "Temporal.Instant.fromEpochMilliseconds()")}}
• {{jsxref("Date.prototype.toTemporalInstant()")}}