Which manner Clock » Instant calculates DST validity in AI2?

[Anke]

App Inventor Clock problem

To understand this behavior, we have to be rigorous about the definitions of the terms Instant Duration An Instant is a milestone on the road of time. The road starts in the year 1970. Some Instants are Milestones in today's section of the road, starting at midnight, depending on where you got them (DatePicker vs TimePicker, etc.) You can tell you have an Instant when you try to display it as text and you get a lot of labelled details you did not expect. A Duration is a pure number of mil…