Re: Time stamp is off

2023-06-20 Thread Stephan Witt
Am 19.06.2023 um 21:30 schrieb R. H. van der Gaag :
> 
> On 19 Jun 2023, at 18:46, Richard Kimberly Heck  wrote:
>> 
>> On 6/19/23 09:36, R. H. van der Gaag wrote:
>>> 
>>> Thanks for checking. Insert date gives the correct (Dutch) time here, too. 
>>> But the time stamps added to the LaTeX preview are always exactly two hours 
>>> behind. A riddle.
>> 
>> Two hours behind sounds like UCT (GMT). European time is one hour ahead but 
>> then another hour for daylight savings. I suspect that your system clock is 
>> set for UCT, which is what LaTeX is picking up.
>> 
>> I've had similar problems on a Windows system.
> 
> My macOS preferences say "Central European Summer Time" and in the terminal I 
> get
> 
> rh@iMac ~ % date
> Mon Jun 19 21:27:10 CEST 2023
> 
> It remains a mystery, then, where LyX or LaTeX gets its UCT/GMT time from. 
> Should I worry about this possibly messing up sync?

Which sync you’re referring to?

I’ve read the code for change tracking in LyX and IMO its as follows:
1. LyX saves the timestamp to the document file as Unix timestamp. No timezone 
involved. (*)
2. LyX converts this timestamp to string presentation via gmtime(3) and 
asctime(3). No timezone involved again.

IMO there is no sync problem in LyX documents. The saved timestamp is always 
w/o timezone. The timestamps in LaTeX export file should be interpreted as UTC.

(*) Others problems are implied:
1. Unix time_t doesn’t consider leap seconds.
2. On 32-bit systems the time ends on January 19, 2038.

Stephan
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Re: Time stamp is off

2023-06-20 Thread Richard Kimberly Heck

On 6/19/23 15:30, R. H. van der Gaag wrote:

On 19 Jun 2023, at 18:46, Richard Kimberly Heck  wrote:

On 6/19/23 09:36, R. H. van der Gaag wrote:

Thanks for checking. Insert date gives the correct (Dutch) time here, too. But 
the time stamps added to the LaTeX preview are always exactly two hours behind. 
A riddle.

Two hours behind sounds like UCT (GMT). European time is one hour ahead but 
then another hour for daylight savings. I suspect that your system clock is set 
for UCT, which is what LaTeX is picking up.

I've had similar problems on a Windows system.

My macOS preferences say "Central European Summer Time" and in the terminal I 
get

  rh@iMac ~ % date
  Mon Jun 19 21:27:10 CEST 2023

It remains a mystery, then, where LyX or LaTeX gets its UCT/GMT time from. 
Should I worry about this possibly messing up sync?


Sync has been the problem for me. But if you're not seeing a problem, I 
wouldn't worry about it.


Riki


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Re: Time stamp is off

2023-06-19 Thread R. H. van der Gaag
On 19 Jun 2023, at 18:46, Richard Kimberly Heck  wrote:
> 
> On 6/19/23 09:36, R. H. van der Gaag wrote:
>> 
>> Thanks for checking. Insert date gives the correct (Dutch) time here, too. 
>> But the time stamps added to the LaTeX preview are always exactly two hours 
>> behind. A riddle.
> 
> Two hours behind sounds like UCT (GMT). European time is one hour ahead but 
> then another hour for daylight savings. I suspect that your system clock is 
> set for UCT, which is what LaTeX is picking up.
> 
> I've had similar problems on a Windows system.

My macOS preferences say "Central European Summer Time" and in the terminal I 
get

 rh@iMac ~ % date
 Mon Jun 19 21:27:10 CEST 2023

It remains a mystery, then, where LyX or LaTeX gets its UCT/GMT time from. 
Should I worry about this possibly messing up sync?

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Re: Time stamp is off

2023-06-19 Thread Richard Kimberly Heck

On 6/19/23 09:36, R. H. van der Gaag wrote:


Thanks for checking. Insert date gives the correct (Dutch) time here, too. But 
the time stamps added to the LaTeX preview are always exactly two hours behind. 
A riddle.


Two hours behind sounds like UCT (GMT). European time is one hour ahead 
but then another hour for daylight savings. I suspect that your system 
clock is set for UCT, which is what LaTeX is picking up.


I've had similar problems on a Windows system.

Riki


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Re: Time stamp is off

2023-06-19 Thread R. H. van der Gaag

> On 18 Jun 2023, at 20:24,   wrote:
> 
>> -Oorspronkelijk bericht-
>> Van: lyx-users  Namens R. H. van der Gaag
>> Verzonden: zondag 18 juni 2023 15:10
> ...
>> On 18 Jun 2023, at 15:01, Maria Gouskova  wrote:
>> 
>>> On Sun, Jun 18, 2023 at 7:22 AM R. H. van der Gaag
>>  wrote:
>>> Hi all,
>>> I noticed the time stamp on tracked changes is two hours off. Solutions 
>>> found
>> online seem to fail. Is there a way to get correct time stamps?
>>> 
>>> I cannot reproduce this here--my time stamps look correct. I am using LyX 
>>> 2.3.6
>> on Linux Mint 21, Cinnamon 5.4.12. (Btw, it helps when you include details 
>> of your
>> system and installation for questions like this).
>> 
>> Of course, sorry about that. This is on LyX 2.3.7, macOS 13.4, on an M1 
>> iMac. I am
>> in the Amsterdam timezone, and time stamps like \lyxadded{RH}{Sun Jun 18
>> 13:00:02 2023} are two hours behind. I worry about this a little bit: time
>> discrepancies can cause nasty synchronisation issues sometimes. This has not
>> happened so far, but since I am working on two machines, I have to be 
>> careful.
> 
> For me it also works correctly. I am in the same timezone (Amsterdam), and my 
> LyX date format is %c
> (Tools / Preferences / Output / General / Dateformat).
> Insert / Date gives Sun Jun 18 20:24:41 2023

Thanks for checking. Insert date gives the correct (Dutch) time here, too. But 
the time stamps added to the LaTeX preview are always exactly two hours behind. 
A riddle.

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RE: Time stamp is off

2023-06-18 Thread kzstatis
> -Oorspronkelijk bericht-
> Van: lyx-users  Namens R. H. van der Gaag
> Verzonden: zondag 18 juni 2023 15:10
...
> On 18 Jun 2023, at 15:01, Maria Gouskova  wrote:
> 
> > On Sun, Jun 18, 2023 at 7:22 AM R. H. van der Gaag
>  wrote:
> > Hi all,
> > I noticed the time stamp on tracked changes is two hours off. Solutions 
> > found
> online seem to fail. Is there a way to get correct time stamps?
> >
> > I cannot reproduce this here--my time stamps look correct. I am using LyX 
> > 2.3.6
> on Linux Mint 21, Cinnamon 5.4.12. (Btw, it helps when you include details of 
> your
> system and installation for questions like this).
> 
> Of course, sorry about that. This is on LyX 2.3.7, macOS 13.4, on an M1 iMac. 
> I am
> in the Amsterdam timezone, and time stamps like \lyxadded{RH}{Sun Jun 18
> 13:00:02 2023} are two hours behind. I worry about this a little bit: time
> discrepancies can cause nasty synchronisation issues sometimes. This has not
> happened so far, but since I am working on two machines, I have to be careful.

For me it also works correctly. I am in the same timezone (Amsterdam), and my 
LyX date format is %c
(Tools / Preferences / Output / General / Dateformat).
Insert / Date gives Sun Jun 18 20:24:41 2023

Kees


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Re: Time stamp is off

2023-06-18 Thread R. H. van der Gaag
On 18 Jun 2023, at 15:01, Maria Gouskova  wrote:

> On Sun, Jun 18, 2023 at 7:22 AM R. H. van der Gaag  
> wrote:
> Hi all,
> I noticed the time stamp on tracked changes is two hours off. Solutions found 
> online seem to fail. Is there a way to get correct time stamps?
> 
> I cannot reproduce this here--my time stamps look correct. I am using LyX 
> 2.3.6 on Linux Mint 21, Cinnamon 5.4.12. (Btw, it helps when you include 
> details of your system and installation for questions like this).

Of course, sorry about that. This is on LyX 2.3.7, macOS 13.4, on an M1 iMac. I 
am in the Amsterdam timezone, and time stamps like \lyxadded{RH}{Sun Jun 18 
13:00:02 2023} are two hours behind. I worry about this a little bit: time 
discrepancies can cause nasty synchronisation issues sometimes. This has not 
happened so far, but since I am working on two machines, I have to be careful.

RH
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Re: Time stamp is off

2023-06-18 Thread Jürgen Spitzmüller
Am Sonntag, dem 18.06.2023 um 13:21 +0200 schrieb R. H. van der Gaag:
> I noticed the time stamp on tracked changes is two hours off.
> Solutions found online seem to fail. Is there a way to get correct
> time stamps?

The time stamp is retrieved from the C++ time() function. Are you sure
your system time is set up correctly?

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Re: Time stamp is off

2023-06-18 Thread Maria Gouskova
On Sun, Jun 18, 2023 at 7:22 AM R. H. van der Gaag 
wrote:

> Hi all,
> I noticed the time stamp on tracked changes is two hours off. Solutions
> found online seem to fail. Is there a way to get correct time stamps?
>

I cannot reproduce this here--my time stamps look correct. I am using LyX
2.3.6 on Linux Mint 21, Cinnamon 5.4.12. (Btw, it helps when you include
details of your system and installation for questions like this).

Maria
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