even that spans across a few days

try shortcode [events_calendar long_events=1 full=1] – https://wp-events-plugin.com/documentation/shortcodes/

Thanks, if you read my post you see that I already did it at the event page. So I eneded up with 2 calendars. One is form the plugin itself and the other from the shortcode. How can I leave just one calendar that is created from the shortcode? Or how I tweak the original one from plugin to span posts?

The solution is here for the benefits of the other readers:

Type in the following URL
https://www.yoursite.com/wp-admin/options.php and find this option:

dbem_full_calendar_long_events
Set 0 to 1 and save

https://www.ads-software.com/support/topic/eevents-that-span-over-more-than-one-day?replies=2

thanks for the update.