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Up here on the Canadian prairies twilight hours on the longest day are from 4:35 AM to 10:35 PM. The official sunrise/sunset is 5:17 to 9:43.
Conversely in on the shortest day in winter twilight goes from 7:45 to 5:07. The official sunrise/sunset is 8:22 to 4:31.
Conversely in on the shortest day in winter twilight goes from 7:45 to 5:07. The official sunrise/sunset is 8:22 to 4:31.