Date.prototype.setDate()
The setDate()
method changes the day of the month of a given Date
instance, based on local time.
To instead change the day of the month for a given Date
instance based on UTC time, use the setUTCDate()
method.
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Syntax
dateObj.setDate(dayValue)
Parameters
dayValue
- An integer representing the day of the month.
Return value
The number of milliseconds between 1 January 1970 00:00:00 UTC and the given date (the
Date
object is also changed in place).
Description
If the dayValue
is outside of the range of date values for the
month, setDate()
will update the Date
object accordingly.
For example, if 0 is provided for dayValue
, the date will be
set to the last day of the previous month.
If a negative number is provided for dayValue
, 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 setDate()
var theBigDay = new Date(1962, 6, 7); // 1962-07-07 (7th of July 1962)
theBigDay.setDate(24); // 1962-07-24 (24th of July 1962)
theBigDay.setDate(32); // 1962-08-01 (1st of August 1962)
theBigDay.setDate(22); // 1962-08-22 (22th of August 1962)
theBigDay.setDate(0); // 1962-07-31 (31th of July 1962)
theBigDay.setDate(98); // 1962-10-06 (6th of October 1962)
theBigDay.setDate(-50); // 1962-08-11 (11th of August 1962)
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Date.prototype.setDate' in that specification. |
Browser compatibility
BCD tables only load in the browser