None of the plugins in the plugins DB have been updated for 3.3, with the exception of theme_crisp , which has been updated for 3.4 and already uses the new Calendar API. Therefore, these testing instructions are developer-focused: Add some events to your site open my/index.php in your editor find the section just after the header, and add: require_once($CFG->dirroot . '/calendar/lib.php'); $calendar = calendar_information::create(time(), SITEID); print_object(calendar_get_upcoming($calendar->courses, true, true, 30, 30)); view your dashboard Confirm that you see your events which are in the next 30 days