javascript extract year from date code example

Example 1: get year from date javascript

document.write(new Date().getFullYear());

Example 2: javascript get day of year from date

//Month -> 0= Jan, 11=Dec | myDate = 6 Dec 2019 10:45
var myDate = new Date(2019, 11, 06, 10, 45);
var dayInYear = Math.floor((myDate - new Date(myDate.getFullYear(), 0, 0)) / (1000 * 60 * 60 * 24));