[LEAPSECS] USNO press release

[Paul Hirose]

On 2016-07-08 12:16, I wrote:
> Is there a mistake in this announcement?
>
>
> http://www.usno.navy.mil/USNO/tours-events/2016_Leap_Second%20Press%20Release%20-%20Final.pdf
>
>
> WASHINGTON, DC -- On December 31, 2016, a “leap second” will be added to
> the world’s clocks at 23 hours, 59 minutes and 59 seconds Coordinated
> Universal Time (UTC).

The mistake is in the first sentence. Nothing unusual happens at 
23:59:59. One second later, at 23:59:60, the leap second begins. In 
other words, UTC will do this:

23:59:59.9
23:59:60.0
23:59:60.1
...
23:59:60.9
00:00:00.0

I have informed the author of the press release.