JavaScript | date.setUTCMonth() - Tutorialspoint.dev

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

dateObj.setUTCMonth(month_Value);

DateObj is a valid Date object created using Date() constructor in which we want to set the month. Value of month is from 0 to 11 because the total number of months in a year is 12 from January to December. Value 0 is used for January, 1 for February and so on till 11 for December.
Parameter: Here parameter is month_Value i.e, the value of month which is used to set in date() constructor.
Return Values: It returns the new i.e updated month which is set by setUTCMonth() function.

<script> 
  
  // Here a date has been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date('October 13, 1996 05:35:32 GMT-3:00'); 
  
  // new month of January is being set in above Date 
  // Object with the help of setUTCMonth() function 
  dateobj.setUTCMonth(0); 
  
  // new month from above Date Object is 
  // being extracted using getUTCMonth() 
  var B = dateobj.getMonth(); 
  
  // Printing new month 
  document.write(B); 
                         
</script>                         

Output:

Errors and Exceptions

Code #1: If in Date() constructor we do not give any month, still setUTCMonth() function set new month which is given as its parameter.

<script> 
  
  // Here month has not been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date('1996, 05:35:32 GMT-3:00'); 
  
  // new month of 2 is being set in above Date 
  // Object with the help of setUTCMonth() function 
  dateobj.setUTCMonth(2); 
  
  // new month from above Date Object is 
  // being extracted using getUTCMonth() 
  var B = dateobj.getUTCMonth(); 
  
  // Printing new month 
  document.write(B); 
  
</script> 

Output:

Code #2: If nothing as parameter is given in Date() constructor, still setUTCMonth() function set month but year, date etc become current ones according to universal time.

<script> 
  
  // Here nothing has been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date(); 
  
  // new month of 11 is being set in above Date 
  // Object with the help of setUTCMonth() function 
  dateobj.setUTCMonth(11); 
  
  // Month from above Date Object is 
  // being extracted using getUTCMonth() 
  var B = dateobj.getUTCMonth(); 
  
  // date from above Date Object is 
  // being extracted using getUTCDate() 
  var C = dateobj.getUTCDate(); 
  
  // year from above Date Object is 
  // being extracted using getUTCFullYear() 
  var D = dateobj.getUTCFullYear(); 
  
  // Printing new month 
  document.write(B + '<br>'); 
  
  // Printing current date 
  document.write(C + '<br>'); 
  
  // Printing current year 
  document.write(D + '<br>'); 
                          
</script>                         

Output:

11
1
2018

Here 11 is the new month of December, 1 is the current date and 2018 is the current year according to universal time.

Code #3: If value of month 15 is given as the parameter of setUTCMonth() function, It will set 3 as the month because month range is from 0 to 11 and hence $15-12=3$ , here 12 is subtracted because 0 to 11 is 12.

<script> 
  
  // Here date has been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date('October 13, 1996 05:35:32 GMT-3:00'); 
  
  // new month of 15 is being set in above Date 
  // Object with the help of setUTCMonth() function 
  dateobj.setUTCMonth(15); 
  
  // month from above Date Object is 
  // being extracted using getUTCMonth() 
  var B = dateobj.getUTCMonth(); 
  
  // year from above Date Object is 
  // being extracted using getUTCFullYear() 
  var C = dateobj.getUTCFullYear(); 
  
  // Printing new month 
  document.write(B + '<br>'); 
  
  // Printing new year 
  document.write(C); 
                         
</script>                         

Output:

 3
1997

Here 3 is the new month of April and year becomes 1997 from 1996 because month range is form 0 to 11 i.e, total 12 and we set new month as 3 which increase year by one to 1997 from 1996 and month becomes 3 according to universal time.

JavaScript | date.setUTCMonth()

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