Hello, I'm Thang from Vietnam, Have 7 years experience in PHP, CSS, HTML, XML, AJAX, programming. And many platforms such as Oscommerce, Prestashop, Joomla, Wordpress, Ossclass, PhpFox, Opencart, Cs-cart, X-cart, CubeCart...
I'm very interested in working on your project and i ensure can help you modify the calendar like that site. Will remove or disable the available date, time for next person. It will not difficult with me.
Looking to work with you.
Thank you and best regards.
Thang