This simple js bookmark let you display the correct commit timestamp at github

Display commit timestamp at github as javascript bookmark

javascript:(function() { 
	var relativeTimeElements = window.document.querySelectorAll("relative-time, time-ago, time.js-timeago");
	function pad(n) {
		return n < 10 ? '0' + n : n;
	}
	relativeTimeElements.forEach(function(timeElement) {
		var d = new Date(timeElement.attributes.datetime.value);
		timeElement.innerHTML = 
			d.getFullYear() + '-' +
			pad(d.getMonth()) + '-' +
			pad(d.getDay()) + ' ' +
			pad(d.getHours()) + ':' +
			pad(d.getMinutes()) + ':' +
			pad(d.getSeconds());
	})
}())