These watches automatically adjust for the extra day in February during leap years
February 29 graces our calendars only once every four years, and the year 2024 is fortunate enough to be one of them. A mechanical calendar watch that automatically takes into account the extra day during a leap year is known as the perpetual calendar.
Last year, Piaget introduced the complication to its Polo model, powered by the ultra-thin 1255P calibre. The Polo Perpetual Calendar Ultra-Thin measures 8.65mm in height overall, one of the thinnest perpetual calendar watches. It’s an impressive feat considering the number of functions it operates—the date, day, month, moon phase, and leap year indication.
The 42mm steel watch features a handsome emerald green dial.
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Combining a chronograph with measurements of intermediate and comparative times, and a perpetual calendar, the A. Lange & Söhne 1815 Rattaprante Perpetual Calendar is a veritable masterpiece in a white gold case with a pink gold dial. The moon phase display, in particular, is extremely precise and only requires a correction only once every 122.6 years.
See also: Panerai welcomes its first annual calendar watches
