javascript get day in words code example

Example 1: js get words first letter

var str = "Java Script Object Notation";
var matches = str.match(/\b(\w)/g); // ['J','S','O','N']
var acronym = matches.join(''); // JSON

console.log(acronym)

Example 2: get month in two digit in javascript date

("0" + (this.getMonth() + 1)).slice(-2)