We know when the sun is rising by the event we're working. Really! In January, we can't start the off road races in Laughlin until after 7am, because it's too dark. In September, we can't start the races in Primm Nevada until 6:15am. In October we don't start the jet ski races until 7am. Can't race in dark water without headlights.
But it doesn't matter when the sun is rising, I still adore it.