Let’s take a look at the dial of the Day/Night and get a sense of what we’re looking at and how it all works. In the center of the watch, you’ve got a main timekeeping dial with simple stick-shaped hour markers, hour and minute hands, and a date window display at six o’clock. Note that the reason for a digital display here is that it’s meant predominately for setting the other functions (more on that in a second) and those other functions required using a central, digital display, instead of the usual spiral display. Simple enough. All of this works exactly like you think it does.
But what’s all that stuff happening around the outside of the dial? That’s the day/night part of this. The top portion of the dial represents the daytime (the lighter color here), while the bottom half of the dial represents the night time (the darker bit). Since the duration of the day and night change throughout the year, there are two “wings” here, one on either side, that move up and down to adjust how long or short each appears. Rotating over those are a Sun indicator and a Moon indicator. The former shows you where the Sun is in its daily cycle, so you know how much longer before sunrise or sunset; the latter is a sort of moon phase display that works by reading the relative position of the Moon in relation to the Sun – if it’s opposite the Sun, you have a full Moon, and if it’s hidden below the Sun, you have a new moon. The Moon moves slightly slower around the dial than the Sun, hence the change in relative positions. After 29.5 days, the Sun laps the Moon and you’re back to the beginning of a new cycle.
from Best Watches For Men https://ift.tt/2mHk5Nf