Emerald Haleakalā

A mechanical analog face showing sunrise, sunset, & altitude/azimuth of the Sun

Emerald Haleakalā, an analog watch face, shows sunrise and sunset, and the altitude and azimuth of the Sun as seen from the user's location.

The 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.

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.

No network access is required; only the device time and location are used internally.

More information is available at the listed website.