How can I put the plugin into “date-only” mode, so that it does not show times to customers?

You can do this by adding a line to your wp-config.php file, after the opening <?php near the top:

define('OPENINGHOURS_DATEONLY', true);

Alternatively, you can use a WordPress filter – add this to your functions.php, or wherever you add filters:

add_filter('openinghours_date_only', '__return_true');

Posted in: WooCommerce Opening Hours and Delivery Times