From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: John Cowan Newsgroups: gmane.lisp.guile.bugs Subject: bug#26632: TAI<->UTC conversion botches 1961 to 1971 Date: Wed, 24 Oct 2018 14:11:42 -0400 Message-ID: References: <20170424010218.GL6765@fysh.org> <87zhv3yjhu.fsf@netris.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="000000000000c9cb770578fd6b6f" X-Trace: blaine.gmane.org 1540404854 18698 195.159.176.226 (24 Oct 2018 18:14:14 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 24 Oct 2018 18:14:14 +0000 (UTC) Cc: zefram@fysh.org, 26632@debbugs.gnu.org To: Mark H Weaver Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Wed Oct 24 20:14:09 2018 Return-path: Envelope-to: guile-bugs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gFNfV-0004jv-0x for guile-bugs@m.gmane.org; Wed, 24 Oct 2018 20:14:09 +0200 Original-Received: from localhost ([::1]:49730 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gFNhb-00024W-HN for guile-bugs@m.gmane.org; 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charset="UTF-8" On Wed, Oct 24, 2018 at 1:58 AM Mark H Weaver wrote: > This has to be examined somewhat indirectly, because SRFI-19 doesn't offer > > any way to display a TAI time in its conventional form as a date-like > > structure, nor to input a TAI time from such a structure. > I think that is as it should be. TAI time is a count of SI seconds from a particular instant in time. It is not divided up into minutes, hours, days, months, years, etc. I realize that this is often done, but I believe it to be not actually meaningful. These terms apply to dynamical time and also in a slightly different way to UTC, but they have little meaning for TAI. -- John Cowan http://vrici.lojban.org/~cowan cowan@ccil.org "Mr. Lane, if you ever wish anything that I can do, all you will have to do will be to send me a telegram asking and it will be done." "Mr. Hearst, if you ever get a telegram from me asking you to do anything, you can put the telegram down as a forgery." --000000000000c9cb770578fd6b6f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Wed, Oct 24, 2018 at 1:58 AM Mark H Weaver <mhw@netris.org> wrote:

> This has = to be examined somewhat indirectly, because SRFI-19 doesn't offer
> any way to display a TAI time in its conventional form as a date-like<= br> > structure, nor to input a TAI time from such a structure.

I think that is as it should be.=C2=A0 TAI time is = a count of SI seconds from a particular instant in time.=C2=A0 It is not di= vided up into minutes, hours, days, months, years, etc. I realize that this= is often done, but I believe it to be not actually meaningful.=C2=A0 These= terms apply to dynamical time and also in a slightly different way to UTC,= but they have little meaning for TAI.

--=C2=A0
John Cowan=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 http://vrici.lojban.org/~cowan=C2=A0 =C2=A0 = =C2=A0 =C2=A0 cowan@ccil.org
=C2=A0 =C2=A0 "Mr. Lane, if you ever wish anything that I can do, al= l you will have
=C2=A0 =C2=A0 =C2=A0 =C2=A0 to do will be to send= me a telegram asking and it will be done."
=C2=A0 =C2=A0 &q= uot;Mr. Hearst, if you ever get a telegram from me asking you to do
=C2=A0 =C2=A0 =C2=A0 =C2=A0 anything, you can put the telegram down as a= forgery."

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