Daylight Saving Shift
in [Java Programming]
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From: Arved Sandstrom on 1 Nov 2009 11:12 Joshua Cranmer wrote: > On 11/01/2009 08:26 AM, Arved Sandstrom wrote: >> When that >> participant says 2 PM he means 2 PM regardless, and you'd think that in >> 2009 software finally could have solved these date/time problems. > > Say a meeting (via telephone, not face-to-face) takes place at 9 AM > Pacific, 5 PM British time on a recurring basis. Is the time coordinated > to UTC (therefore doesn't change during DST, you have to account for it > manually), coordinated to the US Pacific time, or is it coordinated to > the British time? Throw in another dozen localities and suddenly > publishing the local times for every participant is a nightmare. 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. I myself don't understand why this gets people so twisted. I've had to deal with plenty of phone conferences, webexes, etc etc with participants from the West Coast through the East Coast through the Atlantic provinces through to Europe, and it hasn't usually caused major problems if people do proper translations. It doesn't have to be a nightmare - that's the whole thing. If someone says that the proposed meeting time is 3 PM local on Oct 28th of this year, tied to Dublin, I refuse to believe that folks in the other timezones can't locate some decent software that tells them when that is in their spot in their local time. The actual rules for working this stuff out are not that complicated, although lots of software developers certainly seem to find them so. > Plus you have the messy business of trying to remember twice a year > whether or not you have to change your clocks back an hour or forward an > hour. Spring back, fall forward or fall back, spring forward? They both > sound correct to me... 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. AHS
From: Lew on 1 Nov 2009 11:38 Roedy Green wrote: > Daylight saving shift back happened 2AM this 2009-11-01. Not everywhere. -- Lew
From: Lew on 1 Nov 2009 11:42 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. -- Lew
From: Alan Morgan on 1 Nov 2009 12:23 In article <hcjv0m$mi8$1(a)news-int.gatech.edu>, Joshua Cranmer <Pidgeot18(a)verizon.invalid> wrote: >On 11/01/2009 06:04 AM, Roedy Green wrote: >> Daylight saving shift back happened 2AM this 2009-11-01. > >Only if you live in Canada or the US. And then only if you don't live in Hawaii or Arizona (unless you live in the Navajo Nation, in which case you do). The situation in Indiana used to be *completely* insane, but it has now been revised to be merely annoying. All in favor of OST (Obama Standard Time), please raise your hands. Alan -- Defendit numerus
From: Donkey Hottie on 1 Nov 2009 13:06
1.11.2009 16:09, Joshua Cranmer kirjoitti: > Plus you have the messy business of trying to remember twice a year > whether or not you have to change your clocks back an hour or forward an > hour. Spring back, fall forward or fall back, spring forward? They both > sound correct to me... > Rule of thumb: always towards the nearest summer. -- Q: Why did the germ cross the microscope? A: To get to the other slide. |