Patek Philippe placed a perpetual calendar in its pocket watches in 1889 – the year the company received a patent for their mechanism.
That same year, Patek Philippe created a small perpetual calendar movement called the 97975 and fitted it into a ladies pendant watch.
Top watch manufacturers continuously compete over their annual calendar creations – a complication that indicates the hour, day, date, and month.
The mechanism automatically adjusts following months consisting of 30 or 31 days.
However, the individual complications of the instrument can be discovered in models from other renowned manufacturers – all of which gleam with fine workmanship.
The wearer of the watch can also change the day indication language, as it is available in over 28 different languages.
Today, the Rolex Day-Date is commonly known as the Rolex "President" as many presidents and successful individuals have worn it.
Today, the striking Outsize date adorns a number of Lange watches, including the famous Lange 1. Lange & Söhne utilises two superimposed discs to indicate the date that is bordered around the edges and separated by a stylish central bar. This date indication technique has been inspired by classical elements of timekeeping.
Remarkable models incorporating this complication include the Girard-Perregaux 1966, the Patek Philippe Ref.