How to Get Only Day Name or Number in a Week in JavaScript Date()

Question

I am using following code snippets to get the First and last Day of month which working fine but what I need is getting only the Name string like "Fri", "Wed", "Sun" and the code is returning a long Date format as:

Fri Oct 31 2014 00:00:00 GMT-0700 (Pacific Daylight Time)

var today = new Date();
var lastOfMonth = new Date(today.getFullYear(),today.getMonth()+1, 0);

var today = new Date();
var firstOfMonth = new Date(today.getFullYear(),today.getMonth(), 1);

Can you please let me know how I can get ONLY the Name or Number of the day in a week (using getDay()) of the First day?

Answer 1

Use haven't use getDay

today.getDay();

first of month

 firstOfMonth.getDay();

last of month

 lastOfMonth.getDay();

or if u want to get dayname use

var days = ['Sun','Mon','Tues','Wed','Thrus','Fri','Sat'];
//First of month
days[firstOfMonth.getDay()];
//last of month
days[lastOfMonth.getDay()];

Answer 2

You can define arrays

var Months = ['Jan','Feb'....];
var Days = ['Sun','Mon','Tues','Wednes','Thurs','Fri','Sat'];

var firstOfMonth = new Date(today.getFullYear(),Months[today.getMonth()], 1);

var Day = Days[today.getDay()];

Answer 3

Use

lastOfMonth.getDay()

to get the day number.

You can use an array like

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";

to get the written day with

var writtenDay = weekday[lastOfMonth.getDay()];