Re: [LEAPSECS] When did computer timekeeping get good enough for leap seconds to matter?

2014-01-10 Thread Poul-Henning Kamp
In message 20140110050534.e4388406...@ip-64-139-1-69.sjc.megapath.net, Hal Mu rray writes: Do you have data or references for that? If I heard it from anybody less credible, I'd guess it was an urban legend? Was it accurate 50 years ago? Several people deeply involved in the Danish

Re: [LEAPSECS] Standards of time zones -Brooks Harris

2014-01-10 Thread Poul-Henning Kamp
In message 20140110055749.b07c1406...@ip-64-139-1-69.sjc.megapath.net, Hal Mu rray writes: (from a day or two ago...) Brooks Harris bro...@edlmax.com said: So I ask your opinion(s) - Do you think there's a need for a document like I've described? What standards body do you think would be

Re: [LEAPSECS] Standards of time zones -Brooks Harris

2014-01-10 Thread Poul-Henning Kamp
In message 20140110064412.gb20...@ucolick.org, Steve Allen writes: I have asserted that POSIX does not want to know astronomy, does not want to track geophysics, [...] You are right about that. that POSIX really wants to count atomic days rather than mean solar days, And wrong about that.

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-10 Thread Warner Losh
On Jan 9, 2014, at 10:15 PM, Magnus Danielson wrote: On 06/01/14 19:40, Rob Seaman wrote: PDFs of the slides from the talks yesterday (5 Jan 2014) are now available at: http://www.cacr.caltech.edu/futureofutc/aas223/ Thanks for the pointer. Reviewing Kara Warburton's

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-10 Thread Poul-Henning Kamp
In message 82c28c2d-c797-4c56-a2e9-b65f38faf...@bsdimp.com, Warner Losh write s: The side channel issue is why I've advocated, with others, a much longer time horizon for leap seconds. This would allow the useful life of most products to have no need for a communications side channel to get this

Re: [LEAPSECS] Standards of time zones -Brooks Harris

2014-01-10 Thread Poul-Henning Kamp
In message 80159b27-dfc6-431c-819f-99107a143...@noao.edu, Rob Seaman writes: The metaphor for the day tag had my hopes up that this would be a metaphor for the concept of day...no such luck. Not sure one should put much faith in a religious metaphor from a site called antipope.org :-) Charles

Re: [LEAPSECS] Standards of time zones -Brooks Harris

2014-01-10 Thread Rob Seaman
On Jan 10, 2014, at 9:03 AM, Poul-Henning Kamp p...@phk.freebsd.dk wrote: Charles Stross is one of the most gifted and insightfull Science Fiction writers of all time, ... A good introduction to his is this short story about coffee:

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-10 Thread Harlan Stenn
Warner Losh writes: ... A TAI realization of time_t isn't POSIX, which specifically proscribes UTC. I think you mean prescribes. H ___ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs

[LEAPSECS] Leap seconds and religion

2014-01-10 Thread Gerard Ashton
There are potential religious implications associated with dropping leap seconds from civil time. There are perennial calls for improvements to the Gregorian calendar (which of course was instigated by a pope) by modifying the leap year rule. One such proposal is the Revised Julian Calendar,

Re: [LEAPSECS] Standards of time zones -Brooks Harris

2014-01-10 Thread Poul-Henning Kamp
In message 2a2480dc-a5d6-4027-8364-e17af4049...@noao.edu, Rob Seaman writes: Not pertinent, however, to my point about religious metaphors emanating from antipope.org. One might, for instance, be skeptical of comments about ev= olution arising from a creationist web site, however skillful the

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-10 Thread Magnus Danielson
On 10/01/14 20:08, Harlan Stenn wrote: Warner Losh writes: ... A TAI realization of time_t isn't POSIX, which specifically proscribes UTC. I think you mean prescribes. Regardless, today the POSIX standard has a mapping (or used to, last time I checked I was unable to find that mapping,

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-10 Thread Skip Newhall
'Proscribe' and 'prescribe' are distinct words: 'Proscribe' means to forbid, disallow, or prohibit. School rules proscribe the use of pencils on exams. 'Prescribe' means to lay out specifications or rules about something. In the manner prescribed by law. I don't know the context of

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-10 Thread Warner Losh
On Jan 10, 2014, at 8:35 PM, Skip Newhall wrote: 'Proscribe’ and 'prescribe' are distinct words: 'Proscribe' means to forbid, disallow, or prohibit. “School rules proscribe the use of pencils on exams.” 'Prescribe' means to lay out specifications or rules about something. In the