What happens to Time functions when cloud is down

Troubleshooting
1

What will functions like

int a = Time.minute();
int b = Time.hour();

return if there is no cloud connection on boot?

I assume Time.isValid() will be false? In this case I can set an arbitrary time with Time.setTime(1413034662) in order for Time functions to work?

2

There is a RTC on board which once set with the time/date and if kept powered will provide a reasonably accurate time once set.

To answer

What will functions like Time.minute() return if there is no cloud connection on boot?

In my experience either 1970/1/1:00:00:00 i.e. unix epoch = 0 or 1999/12/1:00:00:00 which is what the RTC will return if initialised.

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