February 29, the favorite day of car ownersperpetual calendar watches. That day when technical skill becomes valuable. It is a day that only happens every four years. February 29 is when the Gregorian calendar gives us an extra day.
The reasons must be sought in astronomy since the Earth does not orbit the sun precisely every 365 days but rather every 365 days, 5 hours, 48 minutes and 45 seconds. This quarter of a day that is lost every year, we add on a day like today every four years, thus compensating for the solar year and the civil calendar.
Today, the lucky owners of watches with a perpetual calendar will once again be able to stop and celebrate their capabilities as their technical prodigy allows them to adapt to this leap with millimeter precision.
How does a perpetual calendar work?
Perpetual calendar watches today not only correct the transition from February 28 to February 29 but also jump directly to March 1 at the end of the day. This functionality, which may sound simple, however, responds to a great technical challenge since it requires the development of a mechanical program that records the different durations of the 48 months throughout a complete four-year cycle.
As a rule, this task is handled with a gear with 48 teeth in which the duration of each month over a period of four years is permanently recorded in the form of joints that have different sizes and depths.
And what “extras” does the Lange 1 Tourbillon Perpetual Calendar perpetual calendar offer?
With the operation of the perpetual calendar on the horizon, the engineers and watchmakers of the manufacture Lange & Sohne They decided to give it one more twist. In the Lange 1 Tourbillon Perpetual Calendar, the month indicator was placed on the circumference of a ring that rotates on its central axis once a year, divided into 20 parts every 30 degrees.
Its format is equipped with spaces with different depths for the duration of the months separately, as well as a complex registration mechanism that also takes leap years into account. Additionally, all perpetual calendar indicators advance instantly, allowing for accurate reading at all times. The force necessary for this change in your cycles is generated gradually over every 24 hours. For this reason, the adjustment process does not affect its accuracy range.
And why is this modification of the Perpetual calendar useful?
Well, because it extends the need to correct the clock over time. The mechanism of the Lange 1 Tourbillon Perpetual Calendar is designed so that the first one-day correction does not have to be made until the year 2100. In 2100, according to the centenary rule of the Gregorian calendar, the leap year is omitted and February 29 is skipped as a single exception.
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