var templates = {

prefix: "",

suffix: " ago",

seconds: "less than a minute",

minute: "about a minute",

minutes: "%d minutes",

hour: "about an hour",

hours: "about %d hours",

day: "a day",

days: "%d days",

month: "about a month",

months: "%d months",

year: "about a year",

years: "%d years"

};

var template = function (t, n) {

return templates[t] && templates[t].replace(/%d/i, Math.abs(Math.round(n)));

};

var timer = function (time) {

if (!time) return;

time = time.replace(/\.\d+/, ""); // remove milliseconds

time = time.replace(/-/, "/").replace(/-/, "/");

time = time.replace(/T/, " ").replace(/Z/, " UTC");

time = time.replace(/([\+\-]\d\d)\:?(\d\d)/, " $1$2"); // -04:00 -> -0400

time = new Date(time * 1000 || time);

var now = new Date();

var seconds = ((now.getTime() - time) * .001) >> 0;

var minutes = seconds / 60;

var hours = minutes / 60;

var days = hours / 24;

var years = days / 365;

return templates.prefix + (

seconds < 45 && template('seconds', seconds) || seconds < 90 && template('minute', 1) || minutes < 45 && template('minutes', minutes) || minutes < 90 && template('hour', 1) || hours < 24 && template('hours', hours) || hours < 42 && template('day', 1) || days < 30 && template('days', days) || days < 45 && template('month', 1) || days < 365 && template('months', days / 30) || years < 1.5 && template('year', 1) || template('years', years)) + templates.suffix;

};

return timer(date);