Date.prototype.setUTCHours()

The setUTCHours() method of {{jsxref("Date")}} instances changes the hours, minutes, seconds, and/or milliseconds for this date according to universal time.

{{InteractiveExample("JavaScript Demo: Date.prototype.setUTCHours()")}}

```js interactive-example const event = new Date("August 19, 1975 23:15:30 GMT-3:00");

console.log(event.toUTCString()); // Expected output: "Wed, 20 Aug 1975 02:15:30 GMT"

console.log(event.getUTCHours()); // Expected output: 2

event.setUTCHours(23);

console.log(event.toUTCString()); // Expected output: "Wed, 20 Aug 1975 23:15:30 GMT"

## Syntax

```js-nolint
setUTCHours(hoursValue)
setUTCHours(hoursValue, minutesValue)
setUTCHours(hoursValue, minutesValue, secondsValue)
setUTCHours(hoursValue, minutesValue, secondsValue, msValue)

Parameters#

• hoursValue
• : An integer between 0 and 23 representing the hours.
• minutesValue {{optional_inline}}
• : An integer between 0 and 59 representing the minutes.
• secondsValue {{optional_inline}}
• : An integer between 0 and 59 representing the seconds. If you specify secondsValue, you must also specify minutesValue.
• msValue {{optional_inline}}
• : An integer between 0 and 999 representing the milliseconds. If you specify msValue, you must also specify minutesValue and secondsValue.

Return value#

Changes the {{jsxref("Date")}} object in place, and returns its new timestamp. If a parameter is NaN (or other values that get coerced to NaN, such as undefined), the date is set to Invalid Date and NaN is returned.

Description#

If you do not specify the minutesValue, secondsValue, and msValue parameters, the values returned from the {{jsxref("Date/getUTCMinutes", "getUTCMinutes()")}}, {{jsxref("Date/getUTCSeconds", "getUTCSeconds()")}}, and {{jsxref("Date/getUTCMilliseconds", "getUTCMilliseconds()")}} methods are used.

If a parameter you specify is outside of the expected range, setUTCHours() attempts to update the date information in the {{jsxref("Date")}} object accordingly. For example, if you use 100 for secondsValue, the minutes will be incremented by 1 (minutesValue + 1), and 40 will be used for seconds.

Examples#

Using setUTCHours()#

const theBigDay = new Date();
theBigDay.setUTCHours(8);

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("Date.prototype.getUTCHours()")}}
• {{jsxref("Date.prototype.setHours()")}}