[LEAPSECS] Google, Amazon, now Microsoft

Poul-Henning Kamp phk at phk.freebsd.dk
Sun May 31 04:40:22 EDT 2015

In message <556ABECF.2050405 at edlmax.com>, Brooks Harris writes:

>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?

Most Windows boxes don't run NTP.

Some of them run some oddball M$ time-sync protocol where they ask
their domain-controllers -- if they have one.

Where domain-controllers get their time is anyones guess.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

More information about the LEAPSECS mailing list