The Rolex Sky-Dweller was inspired by an astronomical phenomenon called "Saros", which consists of a planetary mechanism of the cyclical alignment of the Sun, Earth and Moon. In addition, this timepiece has 14 ingenious Rolex patents. One of those patents is the second time zone together with an annual calendar 30-31 day months.
Such is the spirit of a Rolex Sky-Dweller watch. In the picture below you can see the various versions of this fantastic and elegant Rolex wristwatch.