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iamPendergast t1_ixcszt1 wrote on November 22, 2022 at 2:03 PM

Reply to comment by DrugChemistry in TIL the Passemant astronomical clock in Versailles has shown the correct date, time, moon phase, planetary alignment, etc (accounting for leap years ) from 1750 and can display through 9999. by kitkatbloo

I think they mean quartz i.e. digital clocks

DrugChemistry t1_ixctr9a wrote on November 22, 2022 at 2:09 PM

Ohhhhhh

Der_Missionar t1_ixerhdp wrote on November 22, 2022 at 9:59 PM

Yes, quartz crystals which have a very specific resonant frequency which can then be used to keep time.