[ntp:questions] Leap second to be introduced in June

Martin Burnicki martin.burnicki at meinberg.de
Tue Jan 13 14:16:42 UTC 2015

Harlan Stenn wrote:
> Marco Marongiu writes:
>> On 12/01/15 06:10, William Unruh wrote:
>>> I also admit I do not know how windows impliments leap
>>> seconds.
>> I don't have a reference, but I remember that at the time of the latest
>> leap second I read that Windows will half the clock speed at 23:59:59 so
>> that it reaches 00:00:00 at the right time. It pays the price of being
>> wrong for two seconds in order to save the system from a discontinuity.
>> But again, I read it in 2012 somewhere I don't have a reference of, and
>> things may have changed since then.
> The last I saw the unix kernel implements the leap second over 1 second
> of time, and the Windows kernel does this over 2 seconds' time.  I
> recall seeing some whitepapers about this but I won't be able to look
> for a while...

A whitepaper and presentation of my observations until 2013 can be found 

See "Technical Aspects of Leap Second Propagation and Evaluation"

Martin Burnicki

Meinberg Funkuhren
Bad Pyrmont

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