The getUTCDay method returns, according to universal time, the day of the week of the point in time stored in a Date object. The value returned by this method is an integer number from 0 to 6, zero being Sunday and six being Saturday.
Syntax
myDate.getUTCDay()
With myDate being an object based on the Date object.
Instead of being instantiated from a class, in JavaScript objects are created by replicating other objects. This paradigm is called Prototype-based programming.
Example
The following code uses the getUTCDay method to return, according to universal time, the day of the week of the current date stating its number and name:
<script type="text/javascript">
function getDayName(dayNumber)
{
var dayNames = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
return dayNames[dayNumber];
}
var currentDate = new Date();
var universalDayOfTheWeek = currentDate.getUTCDay();
var nameOfTheDay = getDayName(universalDayOfTheWeek);
document.write("According to universal time the number of the current day of the week is " + universalDayOfTheWeek + ", which means it is " + nameOfTheDay + ".");
</script>
function getDayName(dayNumber)
{
var dayNames = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
return dayNames[dayNumber];
}
var currentDate = new Date();
var universalDayOfTheWeek = currentDate.getUTCDay();
var nameOfTheDay = getDayName(universalDayOfTheWeek);
document.write("According to universal time the number of the current day of the week is " + universalDayOfTheWeek + ", which means it is " + nameOfTheDay + ".");
</script>
Technical Details
The getUTCDay method belongs to the Date object, it is available since the version 1.3 of JavaScript, and it is supported in all major browsers.
JavaScript Manual >> Date Object >> getUTCDay Method
