[TUHS] Leap Second

Peter Jeremy peter at rulingia.com
Thu Dec 29 10:21:05 AEST 2016

On 2016-Dec-29 10:59:32 +1100, Dave Horsfall <dave at horsfall.org> wrote:
>(Yes, a repeat, but this momentous event only happens every few years.)

Actually, they've been more frequent of late.

>The International Earth Rotation Service has announced that there will be 
>a Leap Second inserted at 23:59:59 UTC on the 31st December, due to the 
>earth slowly slowing down.  It's fun to listen to see how the time beeps 
>handle it; will your GPS clock display 23:59:60, or will it go nuts 
>(because the programmer was an idiot)?

Google chose an alternative approach to avoiding the 23:59:60 issue and will
smear the upcoming leap second across the period 2016-12-31 14:00:00 UTC
through 2017-01-01 10:00:00 UTC (see https://developers.google.com/time/smear).
Of course, this means that mixing time.google.com with normal NTP servers
will have "interesting" effects.

Peter Jeremy
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