Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!eternal-september.org!feeder.eternal-september.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.153 X-Spam-Level: * X-Spam-Evidence: '*H*': 0.69; '*S*': 0.00; '24,': 0.16; '60,': 0.16; 'constructs.': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'subject:values': 0.16; 'time"': 0.16; 'varies': 0.16; 'wrote:': 0.17; 'received:209.85.214.174': 0.21; 'header:In- Reply-To:1': 0.25; 'am,': 0.27; 'technology.': 0.27; 'message- id:@mail.gmail.com': 0.27; 'argue': 0.29; 'concern': 0.29; "d'aprano": 0.29; 'so-called': 0.29; 'steven': 0.29; 'convert': 0.29; 'fri,': 0.30; 'seconds': 0.30; 'johnson': 0.32; 'to:addr :python-list': 0.33; 'received:google.com': 0.34; 'subject:?': 0.35; 'received:209.85': 0.35; 'display': 0.36; 'why': 0.37; 'received:209': 0.37; 'subject:: ': 0.38; 'talk': 0.38; 'to:addr:python.org': 0.39; 'received:209.85.214': 0.39; 'called': 0.39; 'header:Received:5': 0.40; 'your': 0.60; 'company': 0.60; 'between': 0.63; 'jul': 0.65; 'bodies': 0.71; 'swiss': 0.71; 'day': 0.73; 'yourself': 0.77; 'astronomy,': 0.84; 'proves': 0.84; 'solar': 0.84; 'rick': 0.91 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=G2rpDvMZsAGAgZQxUGAMGTb/7u8GRI++Ohzx79jvoac=; b=l1nky8o23kzIcYHiGW6FhAUdi5kBbLnVTwOHapDdFIgD+ZVOXXZSDDmZ65qDDwDFhn Wx8IQgSXwb2DFXtf/PdztttSJ6tSlf4jStujGgHPvohNsSO1X+ULD9rnXnkormRQ/jMn eDeEuQFZXmtX3PIcyShfRicAPjWeGE+2MiDPoQh0BKwDqVEgancBwobQ3Xyd2jkjLG3Y cXV6A7mHFYgGICELjqaWwRKIPDk9BPwYbt+SYSw9e9WIDi+6tHsPoRvuOrr17GVSzBS7 vkvGGWQ88CRQuTk1SJi1T0RjGilBq5pE6uEts7E8WNb3/Xz7AkLVr6V8ozcnqveDjMgP nJ6w== MIME-Version: 1.0 In-Reply-To: References: <4ff5b086$0$29988$c3e8da3$5496439d@news.astraweb.com> Date: Fri, 6 Jul 2012 01:59:19 +1000 Subject: Re: simpler increment of time values? From: Chris Angelico To: python-list@python.org Content-Type: text/plain; charset=ISO-8859-1 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 22 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1341503967 news.xs4all.nl 6911 [2001:888:2000:d::a6]:53070 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:24932 On Fri, Jul 6, 2012 at 1:39 AM, Rick Johnson wrote: > On Jul 5, 10:19 am, Steven D'Aprano +comp.lang.pyt...@pearwood.info> wrote: >> The number of seconds in a day (true solar day) varies by between 13 and >> 30 seconds depending on the time of the year and the position of the sun. > > Indeed. Which proves that a time keeping system based on the haphazard > movements of celestial bodies is antiquated technology. Talk about job > security! The current *time keeping system* is based atomic clocks. It's only when you want to display this thing called "civil time" (so-called because it causes very uncivil arguments) that you concern yourself with astronomy, base 60, base 24, and other constructs. Now, if you want to argue about a poor choice of standard, look at so-called "Internet Time" that a Swiss watch company invented, which divides a day into 1000 beats. Why use the day as your basis and make it hard to convert to SI units reliably? ChrisA