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Old 10-25-2015, 04:29 AM   #1
Araucaria
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Daylight saving time

How does my Kindle know that daylight saving time ended last night? It does know, as it now shows the right time.

I always keep wifi turned off, and it hasn't been connected to my computer (and Calibre) for a couple of days.

If it was never connected to wifi ever, could it get it wrong sometime in the future?

Last edited by Araucaria; 10-25-2015 at 04:35 AM.
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Old 10-25-2015, 04:47 AM   #2
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Originally Posted by Araucaria View Post
How does my Kindle know that daylight saving time ended last night? It does know, as it now shows the right time.

I always keep wifi turned off, and it hasn't been connected to my computer (and Calibre) for a couple of days.

If it was never connected to wifi ever, could it get it wrong sometime in the future?
Clearly, its system software has an algorithm for the change in daylight savings time

And yes, if your government changes that algorithm at some time in the future, without a software update your Kindle would get it wrong.

Note that in (most of) the US, it changes next weekend.
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Old 10-25-2015, 04:54 AM   #3
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Linux machines generally use the standard tzdata, which knows how to recognize daylight savings time.

I cannot remember offhand what the Kindle does, IIRC it has only one timezone file, but there may be other oddities...?
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Old 10-25-2015, 05:25 AM   #4
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Clearly, its system software has an algorithm for the change in daylight savings time

And yes, if your government changes that algorithm at some time in the future, without a software update your Kindle would get it wrong.

Note that in (most of) the US, it changes next weekend.
Not very likely that the EU will change the rules for "summer time". It's been unified across the EU as running from the last Sunday in March until the last Sunday in October for many years.
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Old 10-25-2015, 07:04 AM   #5
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My Kobo Glo HD time was out an hour until today, so for a for a few months my Kobo will tell the right time!
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Old 10-25-2015, 07:29 AM   #6
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My PW2 is still showing the wrong time and hasn't updated. It doesn't even update to the correct time if turn wi-fi on and sync with the Amazon servers, it has to be done manually.

Last edited by soulfuldog; 10-25-2015 at 07:34 AM.
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Old 10-25-2015, 08:44 AM   #7
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My PW2 is still showing the wrong time and hasn't updated. It doesn't even update to the correct time if turn wi-fi on and sync with the Amazon servers, it has to be done manually.
Is your country listed as the UK in your account?

Shari
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Old 10-25-2015, 09:09 AM   #8
HarryT
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Just checked and both my PW2 and my Voyage have correctly changed the time overnight.
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Old 10-25-2015, 09:28 AM   #9
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That's next week for most of the US.
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Old 10-25-2015, 09:34 AM   #10
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That's next week for most of the US.
...and Canada.

My least favorite day of the year. I'd stay on DST all year, if it were up to me.

The only benefit is that for the next four months, those who persist in referring to time zones as "EST," "CST" and so forth (including Kobo) will be correct. That error makes me nuts and it's rampant most of the year.
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Old 10-25-2015, 09:37 AM   #11
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My least favorite day of the year. I'd stay on DST all year, if it were up to me.
One of my favourite days of the year: an extra hour in bed in the morning!
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Old 10-25-2015, 09:39 AM   #12
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One of my favourite days of the year: an extra hour in bed in the morning!
And now you've had that hour, and darker afternoons for months! So not worth it.
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Old 10-25-2015, 09:43 AM   #13
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And now you've had that hour, and darker afternoons for months! So not worth it.
Pretty much irrelevant when you're as far north as we are in the UK; it gets dark early no matter what. It's dark by about 3:30pm here in mid winter, so the hour's difference is really neither here nor there. There have been suggestions that we should stick to "summer time" all year round, but the objection is that children would then be going to school in the morning in the dark, especially in Scotland, and there are road-safety concerns about that.
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Old 10-25-2015, 10:02 AM   #14
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dark by about 3:30pm here in mid winter
Didn't realize that. I won't complain about it getting dark at 5 pm.

I do prefer the autumn clock change over the spring change.

It's nice most of my devices except the eInk Kindles change the time all by their lonesome.
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Old 10-25-2015, 10:14 AM   #15
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I heart dark time. Nothing better than a cold, dark, rainy Seattle morn to start the day off right.
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