Re: Predictable Internet Time
Stewart Bryant <stewart.bryant@gmail.com> Tue, 03 January 2017 18:55 UTC
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Subject: Re: Predictable Internet Time
To: Cyrus Daboo <cyrus@daboo.name>, Phillip Hallam-Baker <phill@hallambaker.com>
References: <CAMm+LwgfQJ8aG5wB=d3fRbbeje3J9o7Z4_DCuP8DL88ouDeKzw@mail.gmail.com> <504e2cea0d1668c31486b05fec0a967a4446aefe@webmail.weijax.net> <CAMm+Lwi_jU6gjdtdM6a2n_9_89tUvWBNXxnMtSjTEA++h1D4Ew@mail.gmail.com> <e0a43370-751f-808c-3719-9716f9cd57d1@isi.edu> <alpine.DEB.2.11.1701031348430.7102@grey.csi.cam.ac.uk> <0bbfcd7c-11a7-0e7f-56f7-eee959b7a947@gmail.com> <CAMm+Lwi0sQyRE_2dMCkwTk7xTiK2JbHhHSPYMkdG2FeBw_6CNA@mail.gmail.com> <7BDE58D23ADF3BC046F8942D@caldav.corp.apple.com> <b27515e2-a36a-7bf2-0ca4-1fae31a9dc21@gmail.com> <04DD5DFCB528DCD404C81F78@caldav.corp.apple.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Tue, 03 Jan 2017 18:55:33 +0000
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On 03/01/2017 18:38, Cyrus Daboo wrote: > Hi Stewart, > > --On January 3, 2017 at 6:30:19 PM +0000 Stewart Bryant > <stewart.bryant@gmail.com> wrote: > >> Only the UI needs the TZ information, the machine can operate just fine >> with any timescale. That is you present the time in local time, but >> operate in global time, and this is definitely an application that will >> not care about leap seconds. > > No that simply does not work. Repeating events or alarms may not > involve any UI at all, but the device may need to trigger those at a > specific local time - that means time zone information has to be taken > into account somewhere. This is a crucial fact of any calendaring and > scheduling system that those of us who have been using iCalendar > (RFC5545) fully appreciate. > Hi Cyrus, I think that depends on what you consider to be the infrastructure and what you consider the application. I would like to see the CPU clocks, and in particular the time transfer protocols just work on non-jumpy constant-duration-second time since that has to scale from sub-femtoseconds to millennia with sub-femtosecond accuracy without glitching and with unambiguous duration measurements. If we distribute time in the infrastructure as non-jumpy constant-duration-second time , then the iCal system can surely do the conversion to/from whatever format the human needs? Whether it talks to itself in human time or machine time is for those of you that design iCal to determine, but it sounds from what you say that it talks to itself in human time. Whether it does the conversion from machine time to human time, or whether the OS does it for outside the scope of the point I am making. - Stewart
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- Re: Predictable Internet Time Patrik Fältström
- Re: Predictable Internet Time Eliot Lear
- Re: Predictable Internet Time Patrik Fältström
- Re: Predictable Internet Time Eliot Lear
- Re: Predictable Internet Time Tony Finch
- Re: Predictable Internet Time Phillip Hallam-Baker
- Re: Predictable Internet Time Cyrus Daboo
- Re: Predictable Internet Time Jared Mauch
- Re: Predictable Internet Time Stewart Bryant
- Re: Predictable Internet Time Phillip Hallam-Baker
- Re: Predictable Internet Time Phillip Hallam-Baker
- Re: Predictable Internet Time Cyrus Daboo
- Re: Predictable Internet Time Joe Touch
- Re: Predictable Internet Time Stewart Bryant
- Re: Predictable Internet Time Joe Touch
- Re: Predictable Internet Time Stewart Bryant
- Re: Predictable Internet Time Stewart Bryant
- Re: Predictable Internet Time Cyrus Daboo
- Re: Predictable Internet Time Phillip Hallam-Baker
- Re: Predictable Internet Time Ted Lemon
- Re: Predictable Internet Time Stewart Bryant
- Re: Predictable Internet Time Eliot Lear
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- Re: Predictable Internet Time Phillip Hallam-Baker
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- Re: Predictable Internet Time Paul Eggert
- Re: Predictable Internet Time Tony Finch
- Re: Predictable Internet Time Phillip Hallam-Baker
- Re: Predictable Internet Time Patrik Fältström
- Re: Predictable Internet Time Joe Touch
- Re: Predictable Internet Time Joe Touch
- Re: Predictable Internet Time Tony Finch
- Re: Predictable Internet Time Joe Touch
- Re: Predictable Internet Time Joe Touch
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- Re: Predictable Internet Time Tony Finch
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- Re: Predictable Internet Time Tony Finch
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- Re: Predictable Internet Time Stewart Bryant
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- Re: Predictable Internet Time Eliot Lear
- Re: Predictable Internet Time Leif Johansson
- Re: Predictable Internet Time Phillip Hallam-Baker
- Re: Predictable Internet Time Joe Touch
- Re: Predictable Internet Time Patrik Fältström
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- Re: Predictable Internet Time Nico Williams
- Re: Predictable Internet Time Joe Touch
- Re: Predictable Internet Time Tony Finch
- Re: Predictable Internet Time Joe Touch
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- Re: Predictable Internet Time Patrik Fältström
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- Re: Predictable Internet Time Nico Williams
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