Hi Dirk,
That’s unfortunately not possible without some code customization. π
We cannot help with modifying plugin behaviorβcheck out this page for more information: https://theeventscalendar.com/knowledgebase/what-support-is-provided-for-license-holders/
So, you will have to take the reins on any further modifications, but to try and shed some light on this specific problem, I have written a snippet for you that does the job quite well for me when I test it myself. Check out that snippet here and add it to your theme’s functions.php file β https://git.io/vwEvN
Cheers,
George