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Our Complications

We have spent more than 140 years mastering the conception, construction and production of complications. As such, our entire philosophy revolves around these rare, precious and consistently unique creations. Here you'll discover how our mastery of complications has become the ultimate display of our Savoir-Faire.

Theme 1


Time measurement was built upon astronomy and the observation of the sun. Over the years certain rules were adopted in order to simplify and standardize time measurement because conventional time as displayed on the dial differs from true solar time.

The equation of time function serves to indicate the discrepancy from solar time to the nearest minute. Our astronomy models displaying the equation of time, perpetual calendar, sunrise and sunset and astronomical moon-phase indications, exemplify a degree of precision unparalleled in the watch industry.

An Audemars Piguet First

1978 We unveil the first selfwinding, ultra-thin perpetual calendar wristwatch with central rotor.

Astronomy Calculations

Perpetual Calender

The design and production of calendar-equipped watches was the cornerstone of the 1875 founding partnership between Jules Louis Audemars and Edward Auguste Piguet. Such timepieces are to this day a specialty of the company.

The perpetual calendar is truly one of Audemars Piguet's stellar complications. It can display the day, month and year while taking account of the variable lengths of months and of leap years. This means no manual correction will be required until March 1st 2100.

Discover the new Royal Oak Perpetual Calendar


  • 1lunation

    A cycle lasts 29 days, 12 hours, 44 minutes, 2.8 seconds.

  • 374

    The number of parts in the 5134 movement.

  • 2100

    The Perpetual Calender will not require any adjusting up to year 2100.

Other Astronomy Complications

  • Sunrise & SunsetCalibre 2120/2808 is the world's first watch movement to indicate sunrise and sunset times taking into account both longitude and latitude. It is calibrated according to the place determined by its owner. The sunrise and sunset times are effective at sea level and correspond to the universal concept of winter time.
  • Moon PhasesThe astronomical moon phase indication provides an opportunity to admire the waxing and waning phases of the earth's satellite. The watch will continue running without any need for further adjustment for 122 years and 44 days.
  • Equation of TimeThe lapse of time between two consecutive passages of the sun through the meridian in a given place does not have the same length throughout the year. It actually lasts 24 hours only four times a year. The rest of the year, it is sometimes longer and sometimes shorter. According to the longitude and latitude of the place determined by the owner, the equation of time represents the difference between mean solar time and legal time.
  • Dual Time
    Dual TimeIn 1989, Audemars Piguet created the first Dual Time wristwatch to display the time in a second time zone driven by a single selfwinding movement calibre 2229/2845.
  • Day & Time
    Day & DateThe simplest complication on a watch is the date display. Day & Date adds the day of the week to the date complication.

How It Works

100 Years of Accuracy

Month Cam Full rotation every 12 months
Leap Year Cycle Full rotation every 4 years
Year 1 Year 2 Year 3 Leap Year
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Pallet Month Cam Leap Year Cam

28-Day Month

29-Day Month

30-Day Month

31-Day Month

31-Day Month

With a perpetual calendar mechanism, the month cam and leap year cycle cam take 28, 29, 30, and 31-day months into account with no need for adjustment by the user until 2100.

The pallet will travel the longest distance on February 28, advancing the month gear to March 1st.

To reproduce the leap year cycle, the perpetual calendar mechanism is equipped with a notch on the leap year cam that completes a full turn in four years.

The pallet will travel a shorter distance on April 30, advancing the month gear to May 1st.

The palette will travel the shortest distance on October 31, advancing the month gear to November 1st.

    The New Geometry of Time

    Royal Oak Perpetual Calendar

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