Script for running something every hour on the hour no matter when it starts

hourly.js

var now = new Date();
var delay = 60 * 60 * 1000; // 1 hour in msec
console.log('now',new Date().toISOString());console.log('delay',delay,'min',(60 -now.getMinutes()),'sec',(60-now.getSeconds()),'mill',(1000-now.getMilliseconds()));
var start = delay - (now.getMinutes() * 60 + now.getSeconds()) * 1000; //msec until next hour

console.log('start',start);
var kickoff = new Date();
kickoff.setMilliseconds(start);

console.log('kickoff', new Date(kickoff).toISOString());

setTimeout(function timeToNextHour() {
	tick();//First Run (as start is the time left until the next hour)
	setInterval(tick, delay);//Each Hour There After on the hour
}, start);

function tick(){
   console.log(new Date().toISOString());
   console.log('foo')
   console.log('bar')
}