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Haleakalā's two sub-dials show the time of the sunrise and sunset for the current day.
The outermost dial and the thin blue hand indicate the current azimuth of the Sun.
The inner arc of dots and the thin green hand indicate the Sun's current elevation; there is one dot per 10 degrees.
The three additional dots corresponding to elevations of -6, -12, and -18 mark the boundaries of civil, nautical and astronomical
twilight. In the example at left, the Sun is about 10 degrees below the horizon and it is nautical twilight.
The dot at 6 oclock is black for PM and white for AM.
In ambient mode, the same information is presented, with different colors to save energy.
