This year 2100 is of importance for mechanical watches, because according to the Gregorian calendar
it is not a leap year
. Some perpetual calendar
s (eg by IWC
) support the consideration of this exception by a single operator intervention.
reached the accievement even to automate this change, with his development of the wristwatch Perpetual Secular Calender
Namely the watch has a wheel that only rotates once every 400 years and so balances the absence of a leap year in 2100, making it the world's first wristwatch that can do that.
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2100.txt · Last modified: 11.10.2021 17:02 (external edit)