Generate textual time differences that are easily understandable by humans.

The class supports minutes, hours, days, weeks, months and years.

Examples:

• 5 seconds ago -> just now
• 65 seconds ago -> a minute ago
• 120 seconds ago -> 2 minutes ago
• a week ago
• 3 weeks ago
• a month ago
• 8 months ago
• a year ago
• 5 years ago

<?php
require_once 'Date/HumanDiff.php';
$dh = new Date_HumanDiff();
echo $dh->get(time() - 3600);//shows "an hour ago"
?>

https://github.com/azer/relative-date/blob/master/lib/relative-date.js

Javascript; library that's been used as base for Date_HumanDiff

https://github.com/rmm5t/jquery-timeago

Javascript; with localization options

http://pypi.python.org/pypi/py-pretty

Python