Podamibe Appointment Calendar is a FREE WordPress plugin which help you to display your not available date on calendar along with custom form to book date containing basic fields in your website and you can show your available date from this plugin. This plugin is fully responsive with great feature which is built to simplify the user needs.
A perfect plugin to show your available date and book date. You can place the availability calendar anywhere of your site wherever it is appropriate. It has three layout to display with easier shortcode and widget.