Definition and usage
setDate() method is used to set a certain day of the month.
Syntax
dateObject.setDate(day)
| Parameters | Description |
| day | Required. A numerical value (1 ~ 31) representing a day of the month. |
Return value
Adjusted date expressed in milliseconds. Before ECMAScript was standardized, this method returned nothing.
Tips and Notes:
Note: This method is always used in conjunction with a Date object.
Example
In this example, we will set the day of the current month to 15 through the setDate() method:
<script type="text/javascript"> var d = new Date() d.setDate(15) document.write(d) </script>
Output:
Wed Nov 15 2017 10:11:54 GMT+0800 (中国标准时间)
Example:
The second statement below changes from the original value to August 24.
<html> <head> <title>JavaScript setDate Method</title> </head> <body> <script type="text/javascript"> var dt = new Date( "Aug 28, 2008 23:30:00" ); dt.setDate( 24 ); document.write( dt ); </script> </body> </html>
This will produce the following results:
Sun Aug 24 23:30:00 UTC+0530 2008
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