Displaying countdown timer in sticky bar

Keep countdown timer always visible to your visitors by displaying in the ​sticky announcement bar at the top or bottom of any page.
To get started, navigate to Appearance > Elements > Sticky bar:
Sticky bar settings
By default, a dismissed sticky bar will be hidden for 7 days. You can change that by using the option "When closed, re-open after".

Troubleshooting

The sticky bar isn't showing up

Make sure the jQuery library is loaded, to do so, insert this code snippet in the functions.php under WordPress Appearance menu > Theme Editor:
add_action('wp_enqueue_scripts', function() {
if( ! wp_script_is('jquery') || ! wp_script_is('jquery', 'registered') ) {
wp_enqueue_script('jquery', 'https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js', array(), null, true);
}
});