Hello pnegyesi,
Welcome back! Sorry it didn’t work out the first time.
Out of the box, our plugin isn’t exactly built for this functionality. Users have the ability to search by location, but that is not quite the same functionality you are looking for.
I would recommend you take a look at our premium Filter plugin. With the filter plugin, you can add a country category to each event and then users can select which country they want to show on the calendar.
We unfortunately don’t have a live demo set up anywhere but here is a screenshot of it in action. There are a few more screenshots on the product page on the link above.

Does this make sense? Let me know if I can explain anything else!
Cheers!
– Casey Driscoll