Daylight saving time

Araucaria · 10-25-2015, 03:29 AM

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?

pdurrant · 10-25-2015, 03:47 AM

Quote:

Originally Posted by Araucaria

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.

eschwartz · 10-25-2015, 03:54 AM

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...?

HarryT · 10-25-2015, 04:25 AM

Quote:

Originally Posted by pdurrant

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.

Josieb1 · 10-25-2015, 06:04 AM

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!

soulfuldog · 10-25-2015, 06:29 AM

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.

shalym · 10-25-2015, 07:44 AM

Quote:

Originally Posted by soulfuldog

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

HarryT · 10-25-2015, 08:09 AM

Just checked and both my PW2 and my Voyage have correctly changed the time overnight.

copyrite · 10-25-2015, 08:28 AM

That's next week for most of the US.

issybird · 10-25-2015, 08:34 AM

Quote:

Originally Posted by copyrite

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.

HarryT · 10-25-2015, 08:37 AM

Quote:

Originally Posted by issybird

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!

issybird · 10-25-2015, 08:39 AM

Quote:

Originally Posted by HarryT

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.

HarryT · 10-25-2015, 08:43 AM

Quote:

Originally Posted by issybird

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.

copyrite · 10-25-2015, 09:02 AM

Quote:

Originally Posted by HarryT

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.

tubemonkey · 10-25-2015, 09:14 AM

I heart dark time. Nothing better than a cold, dark, rainy Seattle morn to start the day off right.

10-25-2015, 03:29 AM	#1
Araucaria Bibliophile Posts: 166 Karma: 934516 Join Date: Jul 2011 Location: Cantal in the French Auvergne Device: Kindle Voyage, Kobo Libra H20, Kindle PW2, Moon Pro on Lenovo tablet	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 03:35 AM.

10-25-2015, 06:29 AM	#6
soulfuldog I ♥ Calibre Posts: 2,073 Karma: 5678911 Join Date: Aug 2011 Location: UK Device: Kindle Oasis, Voyage, Sony PRS-350, Hudl2	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 06:34 AM.

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10-25-2015, 03:54 AM	#3
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	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...?

10-25-2015, 06:04 AM	#5
Josieb1 Grand Sorcerer Posts: 5,100 Karma: 18051062 Join Date: Nov 2009 Location: UK Device: Kindle Scribe, Coloursoft, PW SE, Kindle 6, Kobo Libra 2, Clara BW	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!

10-25-2015, 08:09 AM	#8
HarryT eBook Enthusiast Posts: 85,560 Karma: 93980341 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	Just checked and both my PW2 and my Voyage have correctly changed the time overnight.

10-25-2015, 08:28 AM	#9
copyrite Wizard Posts: 1,841 Karma: 4985051 Join Date: Sep 2010 Location: Maryland Device: Kindle	That's next week for most of the US.

10-25-2015, 09:14 AM	#15
tubemonkey monkey on the fringe Posts: 45,851 Karma: 158733736 Join Date: May 2010 Location: Seattle Metro Device: Moto E6, Echo Show	I heart dark time. Nothing better than a cold, dark, rainy Seattle morn to start the day off right.