Daylight Saving Shift
in [Java Programming]
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From: Mike Schilling on 2 Nov 2009 23:50 Arne Vajh�j wrote: > > I don't know what Outlook does, but it does not always work well Very true. > for a reoccurring meeting scheduled over DST changes. Arne, there was some uneeded text at the end of your post.
From: Arved Sandstrom on 2 Nov 2009 23:54 Arne Vajhøj wrote: > Lew wrote: >> Arne Vajhøj wrote: >>> Lew wrote: >>>> Arved Sandstrom wrote: >>>>> Just as for the rules for magnetic declination, I don't even try to >>>>> remember any of that. It's easy enough to work out from first >>>>> principles and local knowledge. For example, if you know that DST >>>>> is intended to give you more hours of light in the evening, that >>>>> immediately tells you in what direction the clock must go. >>>> >>>> The irony is that Daylight Savings does not give you more hours of >>>> light in the evening. It just makes people go to (and thus leave) >>>> work an hour earlier. The evening itself still has the same number >>>> of hours of light. >>> >>> Not if the evening starts when you are home from work. >> >> Then when the evening starts depends on what job you do. A farmer's >> evening starts at full dark by that definition. >> >> Doesn't it make more sense to define evening in terms of where the sun >> is than what one's profession is? >> >> I define evening as when the sun is close to setting, i.e., when the >> light begins to fade. It's a fuzzy concept, of course, but utterly >> not dependent on what the clock says. >> >> I define afternoon as when sun passes its zenith. >> >> I find other definitions stupid, as indeed I find the whole concept of >> Daylight Savings Time. Ptui! I spit on the practice! > > Most people follow the clock not the sun. > > Arne Indeed. When I got on the bus after work yesterday (Monday), it was pitch dark, yet I was able to correctly wish the bus driver Good Afternoon. AHS
From: Dr J R Stockton on 3 Nov 2009 09:11 In comp.lang.java.programmer message <hcnnf9$gsq$1(a)news.eternal- september.org>, Mon, 2 Nov 2009 14:45:58, Mike Schilling <mscottschilling(a)hotmail.com> posted: >Arved Sandstrom wrote: >> My point was, you can always pin a meeting time to a datetime in *one* >> given location. Phrasing it as a 9 AM Pacific *and* 5 PM British is >> already a cause of problems - just phrase it as 5 PM British *or* 9 AM >> Pacific, and let the other parties worry about the translation. > >Which places the onus on them to figure out that DST has arrived in a remote >country. Not a recipe for success. Clearly the Southern Hemisphere will never put its clocks forward and back on the same days as the Northern; and, as it seems to be generally agreed that Summer Time should be longer than Winter Time (starting near the Spring Equinox but finishing over a month later than the Autumn one), they'll not change in the opposite direction on the same dates either. There is therefore an essential disagreement between those who have Summer Time in July, those who do not have it, and those who have it in January; and the Lines of Disagreement follow, very approximately, the Tropics of Capricorn and Cancer, with some regions being anomalous. In the Northern Hemisphere, the vast majority of places which change their clocks have chosen to do so on the last Sundays of March and October : In Europe, all but the Far East do it at 01:00 UTC, and in Asia all outside the Middle East change on the same dates but at a fixed local time. The only[1] Northern country which has chosen to act otherwise and use different dates is the USA. The problem that you[2] see is therefore of your own creation, and sympathy from outside should not be expected. You, through your "democratic" system, should have chosen to move to use the same dates as the vast majority of Northern Hemisphere clock-changing countries with a substantial majority of Northern Hemisphere clock-changing people. Then you would only have date difficulty when dealing with the Deep South. [1] Canada made no choice; there, the matter is left to the Provinces. The Provinces all made the same choice of date, but they did not make it simultaneously. Mexican rules also depend on location. The rest of clock-changing North America is in practice a minor detail. [2] Those who do not choose to indicate location or nationality are deemed to be American. -- (c) John Stockton, nr London, UK. ?@merlyn.demon.co.uk Turnpike v6.05. Web <URL:http://www.merlyn.demon.co.uk/> - w. FAQish topics, links, acronyms PAS EXE etc : <URL:http://www.merlyn.demon.co.uk/programs/> - see 00index.htm Dates - miscdate.htm estrdate.htm js-dates.htm pas-time.htm critdate.htm etc.
From: Mike Schilling on 3 Nov 2009 16:33 Dr J R Stockton wrote: .. > > In the Northern Hemisphere, the vast majority of places which change > their clocks have chosen to do so on the last Sundays of March and > October : In Europe, all but the Far East do it at 01:00 UTC, and in > Asia all outside the Middle East change on the same dates but at a > fixed local time. Many don't change their times at all, which causes a discrepency with those that do. > > The problem that you[2] see is therefore of your own creation, and > sympathy from outside should not be expected. Oh, and you're a lunatic.
From: Arne Vajhøj on 3 Nov 2009 19:26
Mike Schilling wrote: > Arne Vajh�j wrote: >> I don't know what Outlook does, but it does not always work well > > Very true. > >> for a reoccurring meeting scheduled over DST changes. > > Arne, there was some uneeded text at the end of your post. For this particular topic that is the relevant occasion. BTW, in general I am not unhappy with it - it mostly works. Arne |