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JavaScript method getDay() returns the day of the week (0 ~ 6) from the Date object

黄舟Original: 2017-11-04 14:23:463567browse

Definition and Usage

getDay() method returns a number representing a certain day of the week.

Syntax

dateObject.getDay()

Return value

The day of the week pointed to by dateObject, using local time. The return value is an integer between 0 (Sunday) and 6 (Saturday).

Tips and Notes:

Note: This method is always used in conjunction with a Date object.

Example

Example 1

In this example, we will get the current day of the week as a number:

<script type="text/javascript">

var d=new Date()
document.write(d.getDay())

</script>

Output:

Example 2

Now, we will create an array so that the above example outputs the name of the week instead of a number:

<script type="text/javascript">

var d=new Date()

var weekday=new Array(7)
weekday[0]="Sunday"
weekday[1]="Monday"
weekday[2]="Tuesday"
weekday[3]="Wednesday"
weekday[4]="Thursday"
weekday[5]="Friday"
weekday[6]="Saturday"

document.write("Today it is " + weekday[d.getDay()])

</script>

Output:

Today it is Saturday

Returns the day of the week to the specified date according to local time.
Example:

<html>
<head>
<title>JavaScript getDay Method</title>
</head>
<body>
<script type="text/javascript">
  var dt = new Date("December 25, 1995 23:15:00");
  document.write("getDay() : " + dt.getDay() ); 
</script>
</body>
</html>

This will produce the following results:

getDay() : 1

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JavaScript method getDay() returns the day of the week (0 ~ 6) from the Date object

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