JavaScript setDate() method

ThesetDate()Method, sets the day of the month for the specified date (Date) object based on local time.

The expected value is1-31, but other values are allowed:

If a month has31days:

If a month has30 days:

Syntax:

date.setDate(day)

Example

var d = new Date();
d.setDate(22);

All browsers fully support the setDate() method:

Method
setDate()	Is	Is	Is	Is	Is

Parameter	Description
day	1to31integer between the two dates, representing a day of the month. If the value exceeds the date range of the month, the setDate() method will update the Date object accordingly. For example, if the value is set to 0, the date will be set to the last day of the previous month.

Return Value:	UTC 1970 Year1Month1Milliseconds between the date 00:00:00 and the given date
JavaScript Version:	ECMAScript 1

This example sets the day of the month to the last day of the previous month:

Example

var d = new Date();
d.setDate(0);