Marc Brett wrote: > On Sat, 15 Oct 2005 00:33:24 GMT, Greg Hennessy > <[EMAIL PROTECTED]> wrote: > >How does NTP tell if the leap second is to added on Dec 31, Jun 30, > >Sep 30th or Mar 31st? > > It can't. NTP simply _assumes_ leap second insertions on Dec 31 or June 30. > For leap seconds scheduled for the end of any other month the whole NTP leap > second model breaks down
This is a bit ironic to point out on World Standards Day. http://www.iso.org/iso/en/commcentre/wsd/2005wsdindex.html The standard defining UTC has admitted leap seconds at the end of *any* month since its 1974 revision when it incorporated the advice from the 1973 General Assembly of the IAU. > Maybe we should petition the NAVSTAR people (and operators of all time > signals) > to hold off inserting leap second announcements until the beginning of the > month > in which they will occur? It seems to me that everyone else should also be petitioned to implement the UTC standard as written. We can expect that there are still some 50 years before more than two leap seconds per year will be needed, so that's plenty of time to retire or upgrade all existing systems. There's almost 300 years before more than 4 leap seconds per year will be needed. Any system with that much foresight would be hard to criticize. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
