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perpetual calendar
(redirected from Perpetual calendars)

   Also found in: Dictionary/thesaurus, Wikipedia 0.01 sec.
perpetual calendar [pər′pech·ə·wəl ′kal·ən·dər]
(astronomy)
A table or mechanical device used to determine the day of the week corresponding to any given date over a period of many years.


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This sale includes a variety of watch 'complications', from minute repeaters to perpetual calendars which never fail to fascinate and intrigue established collectors," said Tim Bourne, international co-head of watches for Christie's.
Yes, it is common sense to know that the day before and the day after is when knowing the current date, but perpetual calendars aren?
It won gold medals at the Universal Exhibitions in Paris, London, Philadelphia and Geneva with its complication watches -- tourbillons, minute repeaters and perpetual calendars -- and was repeatedly successful in what was then the most famous chronometry competition of them all: the one held by the Kew Teddington Observatory London.
 
 
 
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