My Calendar uses a custom templating system to organize event content. Those are how the event data is structured from the individual discrete fields you’ve added to your event.
For single events, that template is inserted inside a standard WordPress template. In the WordPress template hierarchy, it will usually be structured by the single.php or index.php template in your theme.
This can frequently result in your events showing some blog post meta data that isn’t relevant to your events – information like publication date, author, or empty category data.
You can customize the template by creating a single-mc-events.php template file in your theme or child theme directory.
Copy whatever template file is closest to what you want for your event layout, and re-name it to single-mc-events.php or create a custom template for your own needs. You can then edit the template to remove the pieces of information you don’t want or add customizations.