Reading the functions

The video above shows an entire month in 3 minutes! A complete list of day/night’s functions can be found below.

Daytime and nighttime

The light and dark-colored areas around the dial show the length of day and night. The lines separating them represent the horizon. The horizon fans move up or down every 10 days to account for seasonal changes (demonstration video).

Sunrise and sunset

Sunrise is when the sun passes from the darker colored area of the dial into the lighter colored area. Sunset is when the sun passes from the lighter colored area to the darker colored area.

Moon phase

You can imagine the center of the watch as representing the earth. The moon’s position in relation to the sun indicates the moon phase. When the moon is beneath the sun, it is new moon, when the moon is opposite the sun, it is full moon.

Solar noon

Using the pusher at 6 o’clock, solar noon (when the sun is at its highest point in the sky) can be set for your location (demonstration video).

Date

The date indication at 6 o’clock is used to set the watch. The reason this watch does not feature a date spiral is that the dial holds gear wheels near the perimeter, as can be seen in the image below.

Sun and moon position

When facing south, the position of the sun and the moon on the dial indicates the direction in which you will find these heavenly bodies in the sky (demonstration video).