[LEAPSECS] All of this has happened before

[Poul-Henning Kamp]

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In message <C6361893-5DF5-44B5-AD1A-5606A28BB659 at noao.edu>, Rob Seaman writes:

>And length of day most assuredly derives from the synodic day,
>i.e., mean solar time.  Is there not one fewer day in the year than
>sidereal rotations?

"Derives from" is not a "physical reality", it's merely a social custom.


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