JavaScript | date.setDate() function

The date.setDate() is an inbuilt function in JavaScript which is used to set date of a month into a date object which are created using date() constructor.
Syntax:

dateObj.setDate(date_Value);
DateObj is a valid Date object created using Date() 
constructor in which we want to set the date of a month.

Parameter : Here parameter is date_Value 
i.e, the value of date which is used to set in date() 
constructor.
Return Values : It returns the new i.e 
updated date of the month which is set by setDate() function.
The date of the month is an integer value ranging from 1 to 31.
filter_none

edit
close

play_arrow

link
brightness_4
code

// Here a date has been assigned
// while creating Date object
var dateobj = new Date('October 13, 1996 05:35:32');
  
// new date 15 of the month is being set in above Date
// Object with the help of setDate() function
dateobj.setDate(15);
  
// new date of the month from above Date Object is
// being extracted using getDate()
var B = dateobj.getDate();
  
// Printing new date of the month
console.log(B);

chevron_right


Output:

> 15

Errors and Exceptions

  • Code #1: Here as we know that date of the month lies in between 1 to 31 but if we suppose to set date of 33, it will set date 2 for the next month because 33-31=2 and this date 2 becomes date for next of the previous month.
    filter_none

    edit
    close

    play_arrow

    link
    brightness_4
    code

    // Here a date has been assigned
    // while creating Date object
    var dateobj = new Date('October 13, 1996 05:35:32');
      
    // new date 33 of the month is being set in above Date
    // Object with the help of setDate() function
    dateobj.setDate(33);
      
    // new date of the month from above Date Object is
    // being extracted using getDate()
    var B = dateobj.getDate();
      
    // new month from above Date Object is
    // being extracted using getMonth()
    var C = dateobj.getMonth();
      
    // Printing new date of the month
    console.log(B);
      
    // Printing new month
    console.log(C);

    chevron_right

    
    

    Output:

    > 2
    > 10

    In above output 2 is date of the November month and 10 is the month of November because month name start from 0 to 11 i.e, 0 for January and 11 for December.

  • Code #2: If in Date() constructor we do not give any date of the month, still setDate() function set new date which is given as its parameter.
    filter_none

    edit
    close

    play_arrow

    link
    brightness_4
    code

    // Here date has not been assigned
    // while creating Date object
    var dateobj = new Date('October, 1996 05:35:32');
      
    // new date 12 of the month is being set in above Date
    // Object with the help of setDate() function
    dateobj.setDate(12);
      
    // new date of the month from above Date Object is
    // being extracted using getDate()
    var B = dateobj.getDate();
      
    // Printing new date of the month
    console.log(B);

    chevron_right

    
    

    Output:

    > 12
    
  • Code #3: If nothing as parameter is given in Date() constructor, still setDate() function set date but month becomes current month.
    filter_none

    edit
    close

    play_arrow

    link
    brightness_4
    code

    // Here a date has been assigned
    // while creating Date object
    var dateobj = new Date();
      
    // new date 13 of the month is being set in above Date
    // Object with the help of setDate() function
    dateobj.setDate(13);
      
    // date of the month from above Date Object is
    // being extracted using getDate()
    var B = dateobj.getDate();
      
    // month from above Date Object is
    // being extracted using getMonth()
    var C = dateobj.getMonth();
      
    // Printing new date of the month
    console.log(B);
      
    // Printing new month
    console.log(C);

    chevron_right

    
    

    Output:

    > 13
    > 2
    
  • Code #4: If new date of the month set to zero (0), the new date will be set to the last day of the previous month.
    filter_none

    edit
    close

    play_arrow

    link
    brightness_4
    code

    // Here a date has been assigned
    // while creating Date object
    var dateobj = new Date('October 13, 1996 05:35:32');
      
    // new date 0 of the month is being set in above Date
    // Object with the help of setDate() function
    dateobj.setDate(0);
      
    // date of the month from above Date Object is
    // being extracted using getDate()
    var B = dateobj.getDate();
      
    // month from above Date Object is
    // being extracted using getMonth()
    var C = dateobj.getMonth();
      
    // Printing new date of the month
    console.log(B);
      
    // Printing new month
    console.log(C);

    chevron_right

    
    

    Output:

    > 30
    > 8
    


My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.