In the example in the blog post the meeting takes place in Chile, so Berlin time is irrelevant. But let's say you are arranging a conference call between someo

In the example in the blog post the meeting takes place in Chile, so Berlin time is irrelevant. But let's say you are arranging a conference call between someone in Chile and someone in Berlin. When you arrange the meeting you have to define when the meeting takes place. So you have to choose a time zone along with a time for when the meeting starts. You could choose UTC, Berlin or Santiago. But you have to choose one.