JavaScript Date getDay() Method

Below is the example of Date getDay() method.

Example:

<script> 
    // Here a date has been assigned  
    // while creating Date object 
    var A = new Date('October 15, 1996 05:35:32'); 
  
    // Day of the week from above Date Object is 
    // being extracted using getDay() 
    var Day = A.getDay(); 
  
    // Printing day of the week 
    document.write("Number of Day: " +Day); 
</script>                    

Output:

Number of Day: 2

The date.getDay() method is used to fetch the day of a week(0 to 6) from a given Date object.

Syntax:

DateObj.getDay()

Parameter: This method does not accept any parameters.

Return Values: It returns the day of the week for the given date. Day of the week will be returned in the form of integer value ranging from 0 to 6 means 0 for Sunday, 1 for Monday, and so on till 6 for Saturday.

More codes for the above method are as follows:

Program 1: If the date of the month is not given, by default the function considers it as the first date of the month and hence accordingly it returns the day of the week. It is an exceptional case.

<script> 
  // Here a date has been assigned  
  // While creating a Date object 
  var A = new Date('July 1974'); 
   
  var B = A.getDay(); 
   
  // Printing day 
  document.write("Number of Day: "+B); 
</script>                    

Output:

Number of Day: 1

Program 2: The date of the month should must lie in between 1 to 31 because none of the month have date greater than 31 that is why it returns NaN i.e, not a number because date for the month does not exist.

<script> 
  // Here a date has been assigned  
  // while creating Date object 
  var A = new Date('October 35, 1996 05:35:32'); 
  
  // Day of the week from above Date Object 
  // is being extracted using getDay() 
  var B = A.getDay(); 
  
  // Printing day of the week. 
  document.write(B); 
</script> 

Output:

NaN

Program 3: If nothing as parameter is given, it returns current day of the current week.

<script> 
  // Creating Date Object 
  var A = new Date(); 
  
  // day of the week from above object 
  // is being extracted using getDay(). 
  var B = A.getDay() 
  
  // Printing day of the week. 
  document.write(B); 
</script> 

Output:

Supported Browsers: The browsers supported by JavaScript Date getDay() method are listed below:

Google Chrome
Internet Explorer
Firefox
Opera
Safari

My Personal Notes

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