Added support for converting parameters in new version (see example):

<?php

use Awesomite\Chariot\Pattern\PatternRouter;
use Awesomite\Chariot\Pattern\Patterns;
use Awesomite\Chariot\Pattern\StdPatterns\DatePattern;

/*
 * Create router with default settings
 */
$router = PatternRouter::createDefault();

/*
 * Add new route
 */
$router->get('/day/{{ day :date }}', 'showDay');

$route = $router->match('GET', '/day/2017-01-01');
/** @var \DateTimeImmutable $day */
$day = $route->getParams()['day'];
echo 'Day from URL: ', $day->format('Y-m-d'), "\n\n";
/*
 * Output:
 *
 * Day from URL: 2017-01-01
 */

echo $router->linkTo('showDay')->withParam('day', new \DateTime('2017-01-01')), "\n";
/*
 * Output:
 *
 * /day/2017-01-01
 */