[LEAPSECS] June 30 not leap
zefram at fysh.org
Tue Jul 2 05:49:09 EDT 2013
Warner Losh wrote:
>It is gratifying to see how flawlessly this standard is implemented,
>despite over 40 years of it being the standard. I guess the far older
>expectation that every minute has 60 seconds is kinda deeply engrained...
Wikipedia drily notes that "Between 1000 (when al-Biruni used seconds) and
1960 the second was defined as 1/86,400 of a mean solar day". That 1960
endpoint to which it refers is the transition to the ephemeris second.
Rubber-seconds UTC, which has occasional minutes with !=60 seconds,
comes along in 1961. So we've got around 960 years of the second only
being a subdivision of the minute, versus 53 years or so of seconds
being more complicated than that.
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