new date javascript day mont year code example

Example 1: 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));

Example 2: javascript date

const d = new Date();
d.getFullYear(); // 2020
d.getMonth(); // October
d.getDate(); // 4
d.getHours(); // 11
d.getMinutes(); // 20
d.getSeconds(); // 12
d.getMilliseconds(); // 0
d.getTime(); // ????????????