Anyone knwo how to modify KDE locale holiday files?

Does anyone know how to find and modify locale holiday file for a particular country on KDE? I used to modify those holiday files in the directory /usr/share/kf5/libkholidays/plan2/ on other distros like Ubuntu, but no luck for openSUSE 15. The directory isn’t there and can’t be found anywhere on the system. Just wonder how openSUSE sets the locale holidays for any country in the system.

If this is for KOrganizer, it is in Settings>Configure KOrganizer>Time & Date.

No. I mean I want to modify the default setting for locale holidays, i.e. change or add/remove holidays in the default setting, for any particular country. On other KDE distros like Kubuntu, I can simply go to that directory mentioned in my previous post to modify each default holiday file for any country. But on Leap 15 I can’t find this type of default locale holiday files.

From a quick search online, the /usr/share/kf5/libkholidays/plan2/ location appears to be associated with the ‘libkf5holidays-data’ package (peculiar to Debian-type systems perhaps). Although I could find 'libKF5Holidays5 ’ and ‘kholidays’ for openSUSE they don’t appear to use/require the framework you’re used to.