format_tumblr_date.js

function formatTumblrDate(date) {
	var y = date.getFullYear();
	var m = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][date.getMonth()];
	var d = date.getDate();
	d = d+(['st', 'nd', 'rd', 'th'][(/(1?\d)$/.exec(d))[1] - 1] || 'th');
	var h = date.getHours();
	var ampm = ['am', 'pm'][Number(h >= 12)];
	h = h % 12;
	var min = date.getMinutes();
	if (min < 10) min = '0'+min;
	return m+' '+d+', '+y+' '+h+':'+min+ampm;
}