myDate.setMonth( month, [ day ] ) in ECMAScript 262
Set the zero-based month, expressed in the local timezone.
Arguments
| name | type | description | 
|---|---|---|
| month | Number | The new month number, expresse | 
| day | Number | [optional] The new day number, expressed< | 
- Return Type
- Number
Description
If the optional day parameter is omitted, it is left unchanged in the date object.