Innovative and intuitive annual calendar
Specially developed for the Sky-Dweller, the patented Saros annual
calendar is a key element in the model’s identity. The name of this mechanism, with its innovative
design, is inspired by the Greek term denoting the cycle of lunar and solar eclipses.
The Saros calendar automatically differentiates between 30-day and
31-day months. It therefore requires only one manual date adjustment a year, when February turns to
March. It is intuitive and simple to read. The current month is indicated in red in one of the dozen
windows that punctuate the hour markers around the circumference of the dial.
The watchmaking innovation relies on two-gear ratios and only four-gear wheels
added to Rolex’s instantaneous date calendar. This elementary structure gives the Saros annual calendar
excellent reliability.