// `date` is a Date object const dayOfYear = date => Math.floor((date - new Date(date.getFullYear(), 0, 0)) / (1000 * 60 * 60 * 24)); // Example dayOfYear(new Date(2020, 04, 16)); // 137
//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));
const d = new Date(); d.getMonth() + 1; // Month [mm] (1 - 12) d.getDate(); // Day [dd] (1 - 31) d.getFullYear(); // Year [yyyy]
document.write(new Date().getFullYear());