Posted By: snake (Keeping on the sunny side) on 'CZaddresses'
Title:     Re: Leap Seconds
Date:      Mon Jun  2 11:12:02 2003

Kdyby sis Martine precetl to URL, ktere Jerry vlozil, zjistil bys, ze pravdu 
ma on, neni nad unahlene zavery...

Jenze take je pravda, ze se ta vterina vklada podle potreby a asi neni nejaky 
jednoduchy zpusob, jak takove vteriny programove vypocitat (jako se pocitaji 
prestupne roky). Takze si myslim, ze v praxi se sesynchronizuje jen tech par 
nejdulezitejsich zdroju a my vsichni ostatni mame cas od nich, takze nas 
leap second nemusi moc zajimat. Zcela evidentne tudiz nezajima ani 
programatory casovych funkci;-)...

snake 

P.S. Ze slashdotu:

Note that there can be 61 seconds in a minute when a leap second is inserted.

Some Unix systems pretend that leap seconds do not exist, others attept to 
take them into account, using tables of leap seconds. It might be better to 
run the system clock on TAI and convert to UTC or local time with a leap 
second table.

Navic, aby to bylo jeste zajimavejsi:

The next leap second will be inserted into UTC in this way at the end of 
December 1998. In principle, a leap second can be either positive or 
negative, although there have not yet (as of September 1998) been any 
negative leap seconds. Viz 
http://www.lsc-group.phys.uwm.edu/~ballen/grasp-distribution/GRASP/doc/html/nod
e311.html, tech problemu je s casem jeste daleko vic!:-)

> > http://www.npl.co.uk/time/leap_second.html
> > 
> > Proc me zadny pocitacovy casy neberou 31. Prosinec 1998, 23:59:60 jako
> > platnej 
> > cas? Je to o sekundu driv nez bylo 1. Ledna 1999, 00:00:00
> 
> O sekundu driv nez 1. Ledna 1999, 00:00:00 jw 31. Prosinec 1998, 23:59:59
>                                                                        ^^ 
> Tak se nediv ze :60 ti to nebere :) 
> >           Jerry III
> 
> 
>                               Martin OZZY Lipinsky
> 
>                     "But how do you *know* she is a witch?"  
>                          "Because she looks like one!"       
> 

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