You can make your Joomla! website unavailable to visitors until selected date. To enable this option login to Administrator back-end.

1. Click the Extensions → Template Manager → JM-Template-Name → Basic Settings menu item

2. Find field Coming Soon and click Enable button.

3. Next set date in filed Coming Soon Date .

Click the Save button to implement the new settings.

Title and description you can change in Extensions → Module Manager . Find module Our site is coming soon on position coming-soon . You can also publish different type of module if you like.

Coming Soon page can be easily customised in file - /templates/jm-template-name/tpl/comingsoon.php