Why are only past events displayed in Huawei and Google Calendar?

For some months I have the problem that are displayed on my P10 appointments only in the calendar when they are already over. That makes the whole thing of course completely pointless… Even if I create new appointments, they are simply not shown, in neither of the two apps. However, if I open the Google Calendar on another device, e.g. My PC, there's everything where it should be. What can this be? In both apps, all my calendars are selected / activated for display, which is also apparent from the fact that the data must obviously be there if they at least appear retrospectively.

Because Hawaii is twelve hours behind us.