JavaScript | date.setFullYear() Function

The date.setFullYear() is an inbuilt function in JavaScript which is used to set year into a date object which is created using Date() constructor.

Syntax:

DateObj.setFullYear(year_Value)

DateObj is a valid Date object created using Date() constructor in which we want to set the year.

Parameter: Here parameter year_Value is the value of year which is used to set in Date() constructor.

Return Value: It returns the new date with updated year which is set by setFullYear() function.

Below program illustrates the setFullYear() function:

Output:

1992

Errors and Exceptions

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

  // Here year has not been assigned // while creating Date object var dateobj = new Date('October 13, 05:35:32');    // new year 1992 is being set in above Date // Object with the help of setFullYear() function dateobj.setFullYear(1992);    // new year from above Date Object is // being extracted using getFullYear() var B = dateobj.getFullYear();    // Printing new year console.log(B);

  Output:

  1992

• Code #2: If nothing as parameter is given in Date() constructor, still setFullYear() function set year but month and date become current ones.

  // Here nothing has been assigned // while creating Date object var dateobj = new Date();    // new year 2007 is being set in above Date // Object with the help of setFullYear() function dateobj.setFullYear(2007);    // Year from above Date Object is // being extracted using getFullYear() var B = dateobj.getFullYear();    // month from above Date Object is // being extracted using getMonth() var C = dateobj.getMonth();    // date from above Date Object is // being extracted using getDate() var D = dateobj.getDate();    // Printing new year console.log(B);    // Printing current month console.log(C);    // Printing current date console.log(D);

  Output:

  2007
  2
  30
  

  Here in output 2 is the month of March because month name start from 0 to 11 i.e, 0 for January and 11 for December.
  And 30 is the current date.