[LEAPSECS] Google, Amazon, now Microsoft

[Brooks Harris]

On 2015-05-31 02:41 AM, Poul-Henning Kamp wrote:
> --------
> In message <556A6BD2.50608 at edlmax.com>, Brooks Harris writes:
>
>> I can't find any authoritative announcement or statement to this effect
> >from Microsoft, [...]
>
> Please note that this is *only* about Microsofts Azure cloud service,
Yes, that's what that articles says, but what does Microsoft say?
> (which according to rumours are mostly used to run Exchange servers).
Indeed, rumors. What does Microsoft say?
>
> This is *NOT* how your private/work Windows machine will behave,
Well, that's my question. Sure, a single machine catches up when it 
synchronizes to NTP. But what is Windows doing with the Leap Second 
count in each timezone?

The article I referenced earlier said "Applies To:" various Windows 
Server versions - it doesn't mention Vista, Win 7, Win 8, etc.

How the Windows Time Service Works
https://technet.microsoft.com/en-us/library/cc773013(v=ws.10).aspx

So, the timing mechanisms are complex, depending on Windows version, 
hardware, and administration choices.

My question is, if Azure is doing this, what is Windows itself doing?

> for that no new information is available and the most recent
> guidance was that "somewhere between a second and an hour later
> the clock will step a second".
"most recent guidance" from whom?

As I understand it, the clock would step a second when it syncs with 
NTP, but note there are apparently different capability NTP clients in 
various Windows versions. But what happens in different timezones?

-Brooks

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