File size: 2,270 Bytes
780c9fe |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 |
---
title: Date.prototype.setUTCDate()
short-title: setUTCDate()
slug: Web/JavaScript/Reference/Global_Objects/Date/setUTCDate
page-type: javascript-instance-method
browser-compat: javascript.builtins.Date.setUTCDate
sidebar: jsref
---
The **`setUTCDate()`** method of {{jsxref("Date")}} instances changes the day of the month for this date according to universal time.
{{InteractiveExample("JavaScript Demo: Date.prototype.setUTCDate()")}}
```js interactive-example
const event = new Date("August 19, 1975 23:15:30 GMT-3:00");
console.log(event.getUTCDate());
// Expected output: 20
event.setUTCDate(19);
console.log(event.getUTCDate());
// Expected output: 19
```
## Syntax
```js-nolint
setUTCDate(dateValue)
```
### Parameters
- `dateValue`
- : An integer from 1 to 31 representing the day of the month.
### Return value
Changes the {{jsxref("Date")}} object in place, and returns its new [timestamp](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date#the_epoch_timestamps_and_invalid_date). If `dateValue` is `NaN` (or other values that get [coerced](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number#number_coercion) to `NaN`, such as `undefined`), the date is set to [Invalid Date](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date#the_epoch_timestamps_and_invalid_date) and `NaN` is returned.
## Description
If the `dateValue` is outside of the range of date values for the month, `setDate()` will update the {{jsxref("Date")}} object accordingly.
For example, if 0 is provided for `dateValue`, the date will be set to the last day of the previous month. If you use 40 for `dateValue`, and the month stored in the {{jsxref("Date")}} object is June, the day will be changed to 10 and the month will be incremented to July.
If a negative number is provided for `dateValue`, the date will be set counting backwards from the last day of the previous month. -1 would result in the date being set to 1 day before the last day of the previous month.
## Examples
### Using setUTCDate()
```js
const theBigDay = new Date();
theBigDay.setUTCDate(20);
```
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- {{jsxref("Date.prototype.getUTCDate()")}}
- {{jsxref("Date.prototype.setDate()")}}
|