Re: U.S. Naval Observatory to Add Leap Second to Clocks (Forwarded)

On Sun, 25 Dec 2005 12:21:28 +0000, Dr John Stockton
<jrs@xxxxxxxxxxxxxxxxxx> wrote, in part:
>JRS: In article <Pine.LNX.4.44.0512240917330.30060-100000@xxxxxxxxxxxxx
>oronto.ca>, dated Sat, 24 Dec 2005 09:18:03 local, seen in
>news:sci.space.news, Andrew Yee <ayee@xxxxxxxxxxxxxxxxxxxxxx> posted :

>>U.S. Naval Observatory to Add Leap Second to Clocks

>>On December 31, 2005 a "leap second" will be added to the world's clocks
>>at 23 hours, 59 minutes and 59 seconds Coordinated Universal Time (UTC).

>Why is USNO adding the Leap Second one second early?

>The international Leap Second will be at 23:59:60 UTC, one second later
>than stated by USNO.

Until after you've *added* the leap second, that would be a neat trick,
because there is no such time as 23:59:60, December 31, 2005; that time
is known as 0:0:0, January 1, 2006.

The leap second is added following the second beginning at 23:59:59 UTC
on December 31, 2005, and before the second beginning at 0:0:0 UTC on
January 1, 2006.

After the leap second is added, the time at which it begins can be
denoted as "23:59:60 UTC, December 31, 2005".

I can forgive a news release for finding this too complicated to
explain...

John Savard
http://home.ecn.ab.ca/~jsavard/index.html
http://www.quadibloc.com/index.html
_________________________________________
Usenet Zone Free Binaries Usenet Server
More than 140,000 groups
Unlimited download
http://www.usenetzone.com to open account
.

Relevant Pages

  • Re: U.S. Naval Observatory to Add Leap Second to Clocks (Forwarded)
    ... :>>Why is USNO adding the Leap Second one second early? ... Which most places are simply ignoring from a remote sensing point-of-view. ...
    (sci.space.policy)
  • Re: U.S. Naval Observatory to Add Leap Second to Clocks (Forwarded)
    ... Naval Observatory to Add Leap Second to Clocks ... >>Why is USNO adding the Leap Second one second early? ...
    (sci.space.policy)
  • Re: U.S. Naval Observatory to Add Leap Second to Clocks (Forwarded)
    ... Naval Observatory to Add Leap Second to Clocks ... Why is USNO adding the Leap Second one second early? ... The international Leap Second will be at 23:59:60 UTC, ...
    (sci.space.policy)
  • Re: Extra leap seconds due to earthquake?
    ... > internationally-agreed extra leap second or seconds that are sometimes ... > On the GPS front, I think that GPS internal system time (UTC as at ... > satellites) is now 13 seconds ahead of today's UTC, ... It is expected that Celestial Pole offsets related to the IAU1980 Nutation ...
    (sci.geo.satellite-nav)
  • Re: Extended-Range Time Type
    ... since UTC midnight of the current day can be done in ISO C, ... First because "the current day" within ISO C will force you to ... if that day happens to have a leap second (would be Jun or Dec ... determinability of the local timezone, and that the timezone has a integer ...
    (comp.std.c)