diff --git a/includes/kohana/modules/cron/README.markdown b/includes/kohana/modules/cron/README.markdown
new file mode 100644
index 00000000..b08b42f3
--- /dev/null
+++ b/includes/kohana/modules/cron/README.markdown
@@ -0,0 +1,86 @@
+# Kohana-Cron
+
+This module provides a way to schedule tasks (jobs) within your Kohana application.
+
+
+## Installation
+
+Step 1: Download the module into your modules subdirectory.
+
+Step 2: Enable the module in your bootstrap file:
+
+	/**
+	 * Enable modules. Modules are referenced by a relative or absolute path.
+	 */
+	Kohana::modules(array(
+		'cron'       => MODPATH.'cron',
+		// 'auth'       => MODPATH.'auth',       // Basic authentication
+		// 'codebench'  => MODPATH.'codebench',  // Benchmarking tool
+		// 'database'   => MODPATH.'database',   // Database access
+		// 'image'      => MODPATH.'image',      // Image manipulation
+		// 'orm'        => MODPATH.'orm',        // Object Relationship Mapping
+		// 'pagination' => MODPATH.'pagination', // Paging of results
+		// 'userguide'  => MODPATH.'userguide',  // User guide and API documentation
+	));
+
+
+Step 3: Make sure the settings in `config/cron.php` are correct for your environment.
+If not, copy the file to `application/config/cron.php` and change the values accordingly.
+
+
+## Usage
+
+In its simplest form, a task is a [PHP callback][1] and times at which it should run.
+To configure a task call `Cron::set($name, array($frequency, $callback))` where
+`$frequency` is a string of date and time fields identical to those found in [crontab][2].
+For example,
+
+	Cron::set('reindex_catalog', array('@daily', 'Catalog::regenerate_index'));
+	Cron::set('calendar_notifications', array('*/5 * * * *', 'Calendar::send_emails'));
+
+Configured tasks are run with their appropriate frequency by calling `Cron::run()`. Call
+this method in your bootstrap file, and you're done!
+
+
+## Advanced Usage
+
+A task can also be an instance of `Cron` that extends `next()` and/or `execute()` as
+needed. Such a task is configured by calling `Cron::set($name, $instance)`.
+
+If you have access to the system crontab, you can run Cron less (or more) than once
+every request. You will need to modify the lines where the request is handled in your
+bootstrap file to prevent extraneous output. The default is:
+
+	/**
+	 * Execute the main request. A source of the URI can be passed, eg: $_SERVER['PATH_INFO'].
+	 * If no source is specified, the URI will be automatically detected.
+	 */
+	echo Request::instance()
+		->execute()
+		->send_headers()
+		->response;
+
+Change it to:
+
+	if ( ! defined('SUPPRESS_REQUEST'))
+	{
+		/**
+		 * Execute the main request. A source of the URI can be passed, eg: $_SERVER['PATH_INFO'].
+		 * If no source is specified, the URI will be automatically detected.
+		 */
+		echo Request::instance()
+			->execute()
+			->send_headers()
+			->response;
+	}
+
+Then set up a system cron job to run your application's Cron once a minute:
+
+	* * * * * /usr/bin/php -f /path/to/kohana/modules/cron/run.php
+
+The included `run.php` should work for most cases, but you are free to call `Cron::run()`
+in any way you see fit.
+
+
+  [1]: http://php.net/manual/language.pseudo-types.php#language.types.callback
+  [2]: http://linux.die.net/man/5/crontab
diff --git a/includes/kohana/modules/cron/classes/cron.php b/includes/kohana/modules/cron/classes/cron.php
new file mode 100644
index 00000000..7f3d2757
--- /dev/null
+++ b/includes/kohana/modules/cron/classes/cron.php
@@ -0,0 +1,10 @@
+<?php defined('SYSPATH') or die('No direct script access.');
+
+/**
+ * @package Cron
+ *
+ * @author      Chris Bandy
+ * @copyright   (c) 2010 Chris Bandy
+ * @license     http://www.opensource.org/licenses/isc-license.txt
+ */
+class Cron extends Kohana_Cron {}
diff --git a/includes/kohana/modules/cron/classes/kohana/cron.php b/includes/kohana/modules/cron/classes/kohana/cron.php
new file mode 100644
index 00000000..2c28d29b
--- /dev/null
+++ b/includes/kohana/modules/cron/classes/kohana/cron.php
@@ -0,0 +1,621 @@
+<?php defined('SYSPATH') or die('No direct script access.');
+
+/**
+ * @package Cron
+ *
+ * @author      Chris Bandy
+ * @copyright   (c) 2010 Chris Bandy
+ * @license     http://www.opensource.org/licenses/isc-license.txt
+ */
+class Kohana_Cron
+{
+	protected static $_jobs = array();
+	protected static $_times = array();
+
+	/**
+	 * Registers a job to be run
+	 *
+	 * @param   string      Unique name
+	 * @param   array|Cron  Job to run
+	 */
+	public static function set($name, $job)
+	{
+		if (is_array($job))
+		{
+			$job = new Cron(reset($job), next($job));
+		}
+
+		Cron::$_jobs[$name] = $job;
+	}
+
+	/**
+	 * Retrieve the timestamps of when jobs should run
+	 */
+	protected static function _load()
+	{
+		Cron::$_times = Kohana::cache("Cron::run()");
+	}
+
+	/**
+	 * Acquire the Cron mutex
+	 *
+	 * @return  boolean
+	 */
+	protected static function _lock()
+	{
+		$config = Kohana::config('cron');
+		$result = FALSE;
+
+		if (file_exists($config->lock) AND ($stat = @stat($config->lock)) AND time() - $config->window < $stat['mtime'])
+		{
+			// Lock exists and has not expired
+			return $result;
+		}
+
+		$fh = fopen($config->lock, 'a');
+
+		if (flock($fh, LOCK_EX))
+		{
+			fseek($fh, 0, SEEK_END);
+
+			if (ftell($fh) === (empty($stat) ? 0 : $stat['size']))
+			{
+				// Current size matches expected size
+				// Claim the file by changing the size
+				fwrite($fh, '.');
+
+				$result = TRUE;
+			}
+
+			// else, Another process acquired during flock()
+		}
+
+		fclose($fh);
+
+		return $result;
+	}
+
+	/**
+	 * Store the timestamps of when jobs should run next
+	 */
+	protected static function _save()
+	{
+		Kohana::cache("Cron::run()", Cron::$_times, Kohana::config('cron')->window * 2);
+	}
+
+	/**
+	 * Release the Cron mutex
+	 */
+	protected static function _unlock()
+	{
+		return @unlink(Kohana::config('cron')->lock);
+	}
+
+	/**
+	 * @return  boolean FALSE when another instance is running
+	 */
+	public static function run()
+	{
+		if (empty(Cron::$_jobs))
+			return TRUE;
+
+		if ( ! Cron::_lock())
+			return FALSE;
+
+		try
+		{
+			Cron::_load();
+
+			$now = time();
+			$threshold = $now - Kohana::config('cron')->window;
+
+			foreach (Cron::$_jobs as $name => $job)
+			{
+				if (empty(Cron::$_times[$name]) OR Cron::$_times[$name] < $threshold)
+				{
+					// Expired
+
+					Cron::$_times[$name] = $job->next($now);
+
+					if ($job->next($threshold) < $now)
+					{
+						// Within the window
+
+						$job->execute();
+					}
+				}
+				elseif (Cron::$_times[$name] < $now)
+				{
+					// Within the window
+
+					Cron::$_times[$name] = $job->next($now);
+
+					$job->execute();
+				}
+			}
+		}
+		catch (Exception $e) {}
+
+		Cron::_save();
+		Cron::_unlock();
+
+		if (isset($e))
+			throw $e;
+
+		return TRUE;
+	}
+
+	protected $_callback;
+	protected $_period;
+
+	public function __construct($period, $callback)
+	{
+		$this->_period = $period;
+		$this->_callback = $callback;
+	}
+
+	/**
+	 * Execute this job
+	 */
+	public function execute()
+	{
+		call_user_func($this->_callback);
+	}
+
+	/**
+	 * Calculates the next timestamp in this period
+	 *
+	 * @param   integer Timestamp from which to calculate
+	 * @return  integer Next timestamp in this period
+	 */
+	public function next($from)
+	{
+		// PHP >= 5.3.0
+		//if ($this->_period instanceof DatePeriod) { return; }
+		//if (is_string($this->_period) AND preg_match('/^P[\dDHMSTWY]+$/', $period)) { $this->_period = new DateInterval($this->_period); }
+		//if ($this->_period instanceof DateInterval) { return; }
+
+		return $this->_next_crontab($from);
+	}
+
+	/**
+	 * Calculates the next timestamp of this crontab period
+	 *
+	 * @param   integer Timestamp from which to calculate
+	 * @return  integer Next timestamp in this period
+	 */
+	protected function _next_crontab($from)
+	{
+		if (is_string($this->_period))
+		{
+			// Convert string to lists of valid values
+
+			if ($this->_period[0] === '@')
+			{
+				switch (substr($this->_period, 1))
+				{
+					case 'annually':
+					case 'yearly':
+						// '0 0 1 1 *'
+						$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => array(1), 'months' => array(1), 'weekdays' => range(0,6));
+					break;
+
+					case 'daily':
+					case 'midnight':
+						// '0 0 * * *'
+						$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => range(1,31), 'months' => range(1,12), 'weekdays' => range(0,6));
+					break;
+
+					case 'hourly':
+						// '0 * * * *'
+						$this->_period = array('minutes' => array(0), 'hours' => range(0,23), 'monthdays' => range(1,31), 'months' => range(1,12), 'weekdays' => range(0,6));
+					break;
+
+					case 'monthly':
+						// '0 0 1 * *'
+						$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => array(1), 'months' => range(1,12), 'weekdays' => range(0,6));
+					break;
+
+					case 'weekly':
+						// '0 0 * * 0'
+						$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => range(1,31), 'months' => range(1,12), 'weekdays' => array(0));
+					break;
+				}
+			}
+			else
+			{
+				list($minutes, $hours, $monthdays, $months, $weekdays) = explode(' ', $this->_period);
+
+				$months = strtr(strtolower($months), array(
+					'jan' => 1,
+					'feb' => 2,
+					'mar' => 3,
+					'apr' => 4,
+					'may' => 5,
+					'jun' => 6,
+					'jul' => 7,
+					'aug' => 8,
+					'sep' => 9,
+					'oct' => 10,
+					'nov' => 11,
+					'dec' => 12,
+				));
+
+				$weekdays = strtr(strtolower($weekdays), array(
+					'sun' => 0,
+					'mon' => 1,
+					'tue' => 2,
+					'wed' => 3,
+					'thu' => 4,
+					'fri' => 5,
+					'sat' => 6,
+				));
+
+				$this->_period = array(
+					'minutes'   => $this->_parse_crontab_field($minutes, 0, 59),
+					'hours'     => $this->_parse_crontab_field($hours, 0, 23),
+					'monthdays' => $this->_parse_crontab_field($monthdays, 1, 31),
+					'months'    => $this->_parse_crontab_field($months, 1, 12),
+					'weekdays'  => $this->_parse_crontab_field($weekdays, 0, 7)
+				);
+
+				// Ensure Sunday is zero
+				if (end($this->_period['weekdays']) === 7)
+				{
+					array_pop($this->_period['weekdays']);
+
+					if (reset($this->_period['weekdays']) !== 0)
+					{
+						array_unshift($this->_period['weekdays'], 0);
+					}
+				}
+			}
+		}
+
+		$from = getdate($from);
+
+		if ( ! in_array($from['mon'], $this->_period['months']))
+			return $this->_next_crontab_month($from);
+
+		if (count($this->_period['weekdays']) === 7)
+		{
+			// Day of Week is unrestricted, defer to Day of Month
+			if ( ! in_array($from['mday'], $this->_period['monthdays']))
+				return $this->_next_crontab_monthday($from);
+		}
+		elseif (count($this->_period['monthdays']) === 31)
+		{
+			// Day of Month is unrestricted, use Day of Week
+			if ( ! in_array($from['wday'], $this->_period['weekdays']))
+				return $this->_next_crontab_weekday($from);
+		}
+		else
+		{
+			// Both Day of Week and Day of Month are restricted
+			if ( ! in_array($from['mday'], $this->_period['monthdays']) AND ! in_array($from['wday'], $this->_period['weekdays']))
+				return $this->_next_crontab_day($from);
+		}
+
+		if ( ! in_array($from['hours'], $this->_period['hours']))
+			return $this->_next_crontab_hour($from);
+
+		return $this->_next_crontab_minute($from);
+	}
+
+	/**
+	 * Calculates the first timestamp in the next day of this period when both
+	 * Day of Week and Day of Month are restricted
+	 *
+	 * @uses    _next_crontab_month()
+	 *
+	 * @param   array   Date array from getdate()
+	 * @return  integer Timestamp of next restricted Day
+	 */
+	protected function _next_crontab_day(array $from)
+	{
+		// Calculate effective Day of Month for next Day of Week
+
+		if ($from['wday'] >= end($this->_period['weekdays']))
+		{
+			$next = reset($this->_period['weekdays']) + 7;
+		}
+		else
+		{
+			foreach ($this->_period['weekdays'] as $next)
+			{
+				if ($from['wday'] < $next)
+					break;
+			}
+		}
+
+		$monthday = $from['mday'] + $next - $from['wday'];
+
+		if ($monthday <= (int) date('t', mktime(0, 0, 0, $from['mon'], 1, $from['year'])))
+		{
+			// Next Day of Week is in this Month
+
+			if ($from['mday'] >= end($this->_period['monthdays']))
+			{
+				// No next Day of Month, use next Day of Week
+				$from['mday'] = $monthday;
+			}
+			else
+			{
+				// Calculate next Day of Month
+				foreach ($this->_period['monthdays'] as $next)
+				{
+					if ($from['mday'] < $next)
+						break;
+				}
+
+				// Use earliest day
+				$from['mday'] = min($monthday, $next);
+			}
+		}
+		else
+		{
+			if ($from['mday'] >= end($this->_period['monthdays']))
+			{
+				// No next Day of Month, use next Month
+				return $this->_next_crontab_month($from);
+			}
+
+			// Calculate next Day of Month
+			foreach ($this->_period['monthdays'] as $next)
+			{
+				if ($from['mday'] < $next)
+					break;
+			}
+
+			// Use next Day of Month
+			$from['mday'] = $next;
+		}
+
+		// Use first Hour and first Minute
+		return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $from['mday'], $from['year']);
+	}
+
+	/**
+	 * Calculates the first timestamp in the next hour of this period
+	 *
+	 * @uses    _next_crontab_day()
+	 * @uses    _next_crontab_monthday()
+	 * @uses    _next_crontab_weekday()
+	 *
+	 * @param   array   Date array from getdate()
+	 * @return  integer Timestamp of next Hour
+	 */
+	protected function _next_crontab_hour(array $from)
+	{
+		if ($from['hours'] >= end($this->_period['hours']))
+		{
+			// No next Hour
+
+			if (count($this->_period['weekdays']) === 7)
+			{
+				// Day of Week is unrestricted, defer to Day of Month
+				return $this->_next_crontab_monthday($from);
+			}
+
+			if (count($this->_period['monthdays']) === 31)
+			{
+				// Day of Month is unrestricted, use Day of Week
+				return $this->_next_crontab_weekday($from);
+			}
+
+			// Both Day of Week and Day of Month are restricted
+			return $this->_next_crontab_day($from);
+		}
+
+		// Calculate next Hour
+		foreach ($this->_period['hours'] as $next)
+		{
+			if ($from['hours'] < $next)
+				break;
+		}
+
+		// Use next Hour and first Minute
+		return mktime($next, reset($this->_period['minutes']), 0, $from['mon'], $from['mday'], $from['year']);
+	}
+
+	/**
+	 * Calculates the timestamp of the next minute in this period
+	 *
+	 * @uses    _next_crontab_hour()
+	 *
+	 * @param   array   Date array from getdate()
+	 * @return  integer Timestamp of next Minute
+	 */
+	protected function _next_crontab_minute(array $from)
+	{
+		if ($from['minutes'] >= end($this->_period['minutes']))
+		{
+			// No next Minute, use next Hour
+			return $this->_next_crontab_hour($from);
+		}
+
+		// Calculate next Minute
+		foreach ($this->_period['minutes'] as $next)
+		{
+			if ($from['minutes'] < $next)
+				break;
+		}
+
+		// Use next Minute
+		return mktime($from['hours'], $next, 0, $from['mon'], $from['mday'], $from['year']);
+	}
+
+	/**
+	 * Calculates the first timestamp in the next month of this period
+	 *
+	 * @param   array   Date array from getdate()
+	 * @return  integer Timestamp of next Month
+	 */
+	protected function _next_crontab_month(array $from)
+	{
+		if ($from['mon'] >= end($this->_period['months']))
+		{
+			// No next Month, increment Year and use first Month
+			++$from['year'];
+			$from['mon'] = reset($this->_period['months']);
+		}
+		else
+		{
+			// Calculate next Month
+			foreach ($this->_period['months'] as $next)
+			{
+				if ($from['mon'] < $next)
+					break;
+			}
+
+			// Use next Month
+			$from['mon'] = $next;
+		}
+
+		if (count($this->_period['weekdays']) === 7)
+		{
+			// Day of Week is unrestricted, use first Day of Month
+			$from['mday'] = reset($this->_period['monthdays']);
+		}
+		else
+		{
+			// Calculate Day of Month for the first Day of Week
+			$indices = array_flip($this->_period['weekdays']);
+
+			$monthday = 1;
+			$weekday = (int) date('w', mktime(0, 0, 0, $from['mon'], 1, $from['year']));
+
+			while ( ! isset($indices[$weekday % 7]) AND $monthday < 7)
+			{
+				++$monthday;
+				++$weekday;
+			}
+
+			if (count($this->_period['monthdays']) === 31)
+			{
+				// Day of Month is unrestricted, use first Day of Week
+				$from['mday'] = $monthday;
+			}
+			else
+			{
+				// Both Day of Month and Day of Week are restricted, use earliest one
+				$from['mday'] = min($monthday, reset($this->_period['monthdays']));
+			}
+		}
+
+		// Use first Hour and first Minute
+		return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $from['mday'], $from['year']);
+	}
+
+	/**
+	 * Calculates the first timestamp in the next day of this period when only
+	 * Day of Month is restricted
+	 *
+	 * @uses    _next_crontab_month()
+	 *
+	 * @param   array   Date array from getdate()
+	 * @return  integer Timestamp of next Day of Month
+	 */
+	protected function _next_crontab_monthday(array $from)
+	{
+		if ($from['mday'] >= end($this->_period['monthdays']))
+		{
+			// No next Day of Month, use next Month
+			return $this->_next_crontab_month($from);
+		}
+
+		// Calculate next Day of Month
+		foreach ($this->_period['monthdays'] as $next)
+		{
+			if ($from['mday'] < $next)
+				break;
+		}
+
+		// Use next Day of Month, first Hour, and first Minute
+		return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $next, $from['year']);
+	}
+
+	/**
+	 * Calculates the first timestamp in the next day of this period when only
+	 * Day of Week is restricted
+	 *
+	 * @uses    _next_crontab_month()
+	 *
+	 * @param   array   Date array from getdate()
+	 * @return  integer Timestamp of next Day of Week
+	 */
+	protected function _next_crontab_weekday(array $from)
+	{
+		// Calculate effective Day of Month for next Day of Week
+
+		if ($from['wday'] >= end($this->_period['weekdays']))
+		{
+			$next = reset($this->_period['weekdays']) + 7;
+		}
+		else
+		{
+			foreach ($this->_period['weekdays'] as $next)
+			{
+				if ($from['wday'] < $next)
+					break;
+			}
+		}
+
+		$monthday = $from['mday'] + $next - $from['wday'];
+
+		if ($monthday > (int) date('t', mktime(0, 0, 0, $from['mon'], 1, $from['year'])))
+		{
+			// Next Day of Week is not in this Month, use next Month
+			return $this->_next_crontab_month($from);
+		}
+
+		// Use next Day of Week, first Hour, and first Minute
+		return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $monthday, $from['year']);
+	}
+
+	/**
+	 * Returns a sorted array of all the values indicated in a Crontab field
+	 * @link http://linux.die.net/man/5/crontab
+	 *
+	 * @param   string  Crontab field
+	 * @param   integer Minimum value for this field
+	 * @param   integer Maximum value for this field
+	 * @return  array
+	 */
+	protected function _parse_crontab_field($value, $min, $max)
+	{
+		$result = array();
+
+		foreach (explode(',', $value) as $value)
+		{
+			if ($slash = strrpos($value, '/'))
+			{
+				$step = (int) substr($value, $slash + 1);
+				$value = substr($value, 0, $slash);
+			}
+
+			if ($value === '*')
+			{
+				$result = array_merge($result, range($min, $max, $slash ? $step : 1));
+			}
+			elseif ($dash = strpos($value, '-'))
+			{
+				$result = array_merge($result, range(max($min, (int) substr($value, 0, $dash)), min($max, (int) substr($value, $dash + 1)), $slash ? $step : 1));
+			}
+			else
+			{
+				$value = (int) $value;
+
+				if ($min <= $value AND $value <= $max)
+				{
+					$result[] = $value;
+				}
+			}
+		}
+
+		sort($result);
+
+		return array_unique($result);
+	}
+
+}
diff --git a/includes/kohana/modules/cron/config/cron.php b/includes/kohana/modules/cron/config/cron.php
new file mode 100644
index 00000000..80cd3d3e
--- /dev/null
+++ b/includes/kohana/modules/cron/config/cron.php
@@ -0,0 +1,28 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+
+/**
+ * @package Cron
+ *
+ * @author      Chris Bandy
+ * @copyright   (c) 2010 Chris Bandy
+ * @license     http://www.opensource.org/licenses/isc-license.txt
+ */
+
+return array
+(
+	// Path to a writable directory and lock file
+	'lock' => Kohana::$cache_dir.DIRECTORY_SEPARATOR.'cron.lck',
+
+	/**
+	 * Cron does not run EXACTLY when tasks are scheduled.
+	 * A task can be executed up to this many seconds AFTER its scheduled time.
+	 *
+	 * For example, Cron is run at 10:48 and a task was scheduled to execute at
+	 * 10:45, 180 seconds ago. If window is greater than 180, the task will be
+	 * executed.
+	 *
+	 * This value should always be larger than the time it takes to run all
+	 * your tasks.
+	 */
+	'window' => 300,
+);
diff --git a/includes/kohana/modules/cron/run.php b/includes/kohana/modules/cron/run.php
new file mode 100644
index 00000000..6cafdbf8
--- /dev/null
+++ b/includes/kohana/modules/cron/run.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @package Cron
+ *
+ * @author      Chris Bandy
+ * @copyright   (c) 2010 Chris Bandy
+ * @license     http://www.opensource.org/licenses/isc-license.txt
+ */
+
+// Path to Kohana's index.php
+$system = dirname(dirname(dirname(__FILE__))).DIRECTORY_SEPARATOR.'index.php';
+
+if (file_exists($system))
+{
+	defined('SUPPRESS_REQUEST') or define('SUPPRESS_REQUEST', TRUE);
+
+	include $system;
+
+	// If Cron has been run in APPPATH/bootstrap.php, this second call is harmless
+	Cron::run();
+}
diff --git a/includes/kohana/modules/cron/tests/kohana/cron.php b/includes/kohana/modules/cron/tests/kohana/cron.php
new file mode 100644
index 00000000..5286c098
--- /dev/null
+++ b/includes/kohana/modules/cron/tests/kohana/cron.php
@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * @package Cron
+ * @group   kohana
+ * @group   kohana.cron
+ *
+ * @author      Chris Bandy
+ * @copyright   (c) 2010 Chris Bandy
+ * @license     http://www.opensource.org/licenses/isc-license.txt
+ */
+class Kohana_Cron_Test extends PHPUnit_Framework_TestCase
+{
+	/**
+	 * @test
+	 * @dataProvider    provider_next
+	 *
+	 * @param   string  Period
+	 * @param   integer Timestamp from which to calculate
+	 * @param   integer Next timestamp in period
+	 */
+	public function test_next($period, $from, $expected_result)
+	{
+		$cron = new Cron($period, NULL);
+		$result = $cron->next($from);
+
+		$this->assertSame($expected_result, $result);
+	}
+
+	public function provider_next()
+	{
+		return array
+		(
+			array('@annually',  mktime(8, 45, 0, 11, 19, 2009), mktime(0, 0, 0, 1, 1, 2010)),
+			array('@monthly',   mktime(8, 45, 0, 11, 19, 2009), mktime(0, 0, 0, 12, 1, 2009)),
+			array('@weekly',    mktime(8, 45, 0, 11, 19, 2009), mktime(0, 0, 0, 11, 22, 2009)),
+			array('@daily',     mktime(8, 45, 0, 11, 19, 2009), mktime(0, 0, 0, 11, 20, 2009)),
+			array('@hourly',    mktime(8, 45, 0, 11, 19, 2009), mktime(9, 0, 0, 11, 19, 2009)),
+
+			array('* * * * *',  mktime(8, 45, 0, 11, 19, 2009), mktime(8, 46, 0, 11, 19, 2009)),
+
+			array(
+				'* * * * 0',                    // Sundays
+				mktime(0, 0, 0, 11, 30, 2009),  // Monday, Nov 30, 2009
+				mktime(0, 0, 0, 12, 6, 2009)    // Sunday, Dec 6, 2009
+			),
+
+			array(
+				'* * 15 * 6',                   // 15th and Saturdays
+				mktime(0, 0, 0, 11, 29, 2009),  // Sunday, Nov 29, 2009
+				mktime(0, 0, 0, 12, 5, 2009)    // Saturday, Dec 5, 2009
+			),
+
+			array(
+				'* * * * 1,5',                  // Mondays and Fridays
+				mktime(0, 0, 0, 11, 24, 2009),  // Tuesday, Nov 24, 2009
+				mktime(0, 0, 0, 11, 27, 2009)   // Friday, Nov 27, 2009
+			),
+
+			array(
+				'* * 15 * 6-7',                 // 15th, Saturdays, and Sundays
+				mktime(0, 0, 0, 11, 23, 2009),  // Monday, Nov 23, 2009
+				mktime(0, 0, 0, 11, 28, 2009)   // Saturday, Nov 28, 2009
+			),
+
+			array(
+				'* * 15,30 * 2',                // 15th, 30th, and Tuesdays
+				mktime(0, 0, 0, 11, 29, 2009),  // Sunday, Nov 29, 2009
+				mktime(0, 0, 0, 11, 30, 2009)   // Monday, Nov 30, 2009
+			),
+
+			array(
+				'0 0 * * 4',                    // Midnight on Thursdays
+				mktime(1, 0, 0, 11, 19, 2009),  // 01:00 Thursday, Nov 19, 2009
+				mktime(0, 0, 0, 11, 26, 2009)   // 00:00 Thursday, Nov 26, 2009
+			),
+
+			array(
+				'0 0 */2 * 4',                  // Midnight on odd days and Thursdays
+				mktime(1, 0, 0, 11, 19, 2009),  // 01:00 Thursday, Nov 19, 2009
+				mktime(0, 0, 0, 11, 21, 2009)   // 00:00 Saturday, Nov 21, 2009
+			),
+		);
+	}
+}