Wrong date at the event

Hi,

I have a question about displaying the date on the calendar. For example: http://www.toerismealphen-chaam.nl/wp-content/uploads/2018/07/bijlage-1.png

This event is on July 7 in 2019, but if someone goes to the event, the date is July 19th. See: http://www.toerismealphen-chaam.nl/kalender/jaarmarkt-alphen/

I hope you could help me with this issue. I really like to hear from you.

Thanks in advance.

Hendrik

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