[ntp:questions] leap second happens on...

Brian Utterback brian.utterback at oracle.com
Fri May 25 14:51:38 UTC 2012

On 5/25/2012 7:18 AM, Marco Marongiu wrote:
> ...on June 30th/July 1st transition, so we'll have:
> June 30th 23:59:59
> June 30th 23:59:60
> July 1st  00:00:00
> The question is: does it happen at 00:00:00 UTC (so it must be shifted
> ahead/behind depending on the timezone) or, by convention, it happens at
> 00:00:00 at the local timezone?
> I am quite sure the first is the right one, but a colleague of mine
> asked me the question well enough to make a doubt arise in my brain :)

The leap second is inserted in UTC time, thus it is inserted at exactly 
the same moment for everyone no matter what timezone you are in.

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