[javascript] Day Name from Date in JS

var days = [
    "Sunday",
    "Monday",
    "...", //etc
    "Saturday"
];

console.log(days[new Date().getDay()]);

Simple, read the Date object in JavaScript manual

To do other things with date, like get a readable string from it, I use:

var d = new Date();
d.toLocaleString();

If you just want time or date use:

d.toLocaleTimeString();
d.toLocaleDateString();

You can parse dates either by doing:

var d = new Date(dateToParse);

or

var d = Date.parse(dateToParse);