var d = new Date("2011-04-20T09:30:51.01");d.getHours(); // => 9d.getMinutes(); // =>  30d.getSeconds(); // => 51

or

var d = new Date(); // for nowd.getHours(); // => 9d.getMinutes(); // =>  30d.getSeconds(); // => 51

Short and simple:

new Date().toLocaleTimeString(); // 11:18:48 AM//---new Date().toLocaleDateString(); // 11/16/2015//---new Date().toLocaleString(); // 11/16/2015, 11:18:48 PM

4 hours later (use milisec: sec==1000):

new Date(new Date().getTime() + 4*60*60*1000).toLocaleTimeString(); // 3:18:48 PM or 15:18:48

2 days before:

new Date(new Date().getTime() - 2*24*60*60*1000).toLocaleDateString() // 11/14/2015

Get and set the current time efficiently using javascript

I couldn't find a solution that did exactly what I needed. I wanted clean and tiny code so I came up with this:

(Set once in your master.js and invoke when required.)

PURE JAVASCRIPT

function timeNow(i) {  var d = new Date(),    h = (d.getHours()<10?'0':'') + d.getHours(),    m = (d.getMinutes()<10?'0':'') + d.getMinutes();  i.value = h + ':' + m;}

<a onclick="timeNow(test1)" href="#">SET TIME</a><input id="test1" type="time" value="10:40" />