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Another JScript date/time bug, it seems

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  Another JScript date/time bug, it seems Dr J R Stockton <J.R.Stockton@physics.org> - 2017-03-20 16:42 -0700
    Re: Another JScript date/time bug, it seems "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-03-21 10:30 +0100
      Re: Another JScript date/time bug, it seems Dr J R Stockton <J.R.Stockton@physics.org> - 2017-03-21 12:29 -0700
        Re: Another JScript date/time bug, it seems Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-03-22 09:09 +0100
          Re: Another JScript date/time bug, it seems Dr J R Stockton <J.R.Stockton@physics.org> - 2017-03-22 02:13 -0700
        Re: Another JScript date/time bug, it seems Dr J R Stockton <J.R.Stockton@physics.org> - 2017-03-23 09:22 -0700
          Re: Another JScript date/time bug, it seems Dr J R Stockton <J.R.Stockton@physics.org> - 2017-03-26 05:45 -0700
            Re: Another JScript date/time bug, it seems "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-03-26 17:42 +0200
              Re: Another JScript date/time bug, it seems Dr J R Stockton <J.R.Stockton@physics.org> - 2017-03-28 08:16 -0700
    Re: Another JScript date/time bug, it seems Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-03-21 16:37 +0100

#32823 — Another JScript date/time bug, it seems

Note date/time of posting.

Please test in Europe while still Winter Time, and in US/CA  !!

My Location : Greater London
Op Sys : Win XP sp3, up-to-date
SubSys : Command Prompt
TIME : 2017-03-20 23:37 Approx
SCREEN :


Prompt>echo.|date
The current date is: 2017-03-20
Enter the new date: (yy-mm-dd)

Prompt>echo.|time
The current time is: 23:37:25.95
Enter the new time:

Prompt>type $kk.js
 WScript.StdErr.WriteLine(new Date())


Prompt>cscript //nologo $kk.js
Tue Mar 21 00:37:36 UTC+0100 2017

Prompt>echo.|date
The current date is: 2017-03-20
Enter the new date: (yy-mm-dd)

Prompt>echo.|time
The current time is: 23:37:56.78
Enter the new time:


AMAZEMENT!

-- 
  (c) John Stockton, near London, UK.  Using Google, no spell-check. |
 Mail: J.R.""""""""@physics.org  

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#32826

Dr J R Stockton <J.R.Stockton@physics.org> wrote on 21 Mar 2017 in 
comp.lang.javascript:

> Note date/time of posting.
> 
> Please test in Europe while still Winter Time, and in US/CA  !!
> 
> My Location : Greater London
> Op Sys : Win XP sp3, up-to-date
> SubSys : Command Prompt
> TIME : 2017-03-20 23:37 Approx
> SCREEN :
> 
> 
> Prompt>echo.|date
> The current date is: 2017-03-20
> Enter the new date: (yy-mm-dd)
> 
> Prompt>echo.|time
> The current time is: 23:37:25.95
> Enter the new time:
> 
> Prompt>type $kk.js
>  WScript.StdErr.WriteLine(new Date())
> 
> 
> Prompt>cscript //nologo $kk.js
> Tue Mar 21 00:37:36 UTC+0100 2017
> 
> Prompt>echo.|date
> The current date is: 2017-03-20
> Enter the new date: (yy-mm-dd)
> 
> Prompt>echo.|time
> The current time is: 23:37:56.78
> Enter the new time:
> 
> 
> AMAZEMENT!

Must be a severe case of Brexitis mayensis, 
since overhere:

Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. All rights reserved.

C:\Users\Evertjan>echo.|time
The current time is: 10:17:52.76
Enter the new time:

C:\Users\Evertjan>echo.|date
The current date is: 21-03-2017
Enter the new date: (dd-mm-yy)

C:\Users\Evertjan>echo WScript.StdErr.WriteLine(new Date()) >kk.js

C:\Users\Evertjan>type kk.js
WScript.StdErr.WriteLine(new Date())

C:\Users\Evertjan>cscript //nologo kk.js
Tue Mar 21 10:21:11 UTC+0100 2017

Seriously, May may, like the Mau Mau, have nothing to do with it,
just your [nonreported] version of c//wscript engine, perhaps?
Or that of the O.S.?

-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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#32829

On Tuesday, March 21, 2017 at 9:30:48 AM UTC, Evertjan. wrote:
> Dr J R Stockton <J.R.Stockton@p*.o*> wrote on 21 Mar 2017 in 
> comp.lang.javascript:
> 
> > Note date/time of posting.



8<------------------------------------------------------------------------
:: THIS IS *ALL* $kk.bat

@echo WScript.StdErr.WriteLine("  This is $kk.js output :-")   >  $kk.js
@echo WScript.StdErr.WriteLine("  CMD.EXE says %date% %time%") >> $kk.js
@echo WScript.StdErr.WriteLine("  WScript says " + new Date()) >> $kk.js
type $kk.js
@echo.
@cscript //nologo $kk.js
@del $kk.js
@echo.
@goto ZZZZ


Results, testing in UK
on Tuesday 21 Mar 2017 : US Summer Time, EU Winter Time :-


Windows XP sp3 :-

  CMD.EXE says 2017-03-21 11:39:14.96
  WScript says Tue Mar 21 12:39:15 UTC+0100 2017


Windows 7 :-

  CMD.EXE says 2017-03-21 11:35:56.38
  WScript says Tue Mar 21 12:35:56 UTC+0100 2017


Windows 10 :-

  CMD.EXE says 2017-03-21 12:22:10.85
  WScript says Tue Mar 21 13:22:10 UTC+0100 2017

I've not yet managed to get the JScript version and build numbers.


"Web" JScript executed in MSIE in those systems here today correctly uses
EU Winter Time, OK.


So, we can say that, probably over the interval in which US & UK differ
as to whether it is Summer Time, 1/24 of the time JScript does not
even know which day of the week it is.

Summer Time note to WSOTP : NA starts 2nd Sun Mar, EU on last Sun Mar.

:ZZZZ
8<------------------------------------------------------------------------


-- 
  (c) John Stockton, near London, UK.  Using Google, no spell-check. |
 Mail: J.R.""""""""@physics.org                                      |

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#32832

Dr J R Stockton wrote:

> I've not yet managed to get the JScript version and build numbers.

ScriptEngine() + " " + ScriptEngineMajorVersion() + "." + 
ScriptEngineMinorVersion() + "." + ScriptEngineBuildVersion()

-- 
PointedEars
FAQ: <http://PointedEars.de/faq> | <http://PointedEars.de/es-matrix>
<https://github.com/PointedEars> | <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.

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#32834

On Wednesday, March 22, 2017 at 8:09:09 AM UTC, Thomas 'PointedEars' Lahn wrote:
> Dr J R Stockton wrote:
> 
> > I've not yet managed to get the JScript version and build numbers.
> 
> ScriptEngine() + " " + ScriptEngineMajorVersion() + "." + 
> ScriptEngineMinorVersion() + "." + ScriptEngineBuildVersion()

Too late to be useful.

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#32838

On Tuesday, March 21, 2017 at 7:29:15 PM UTC, Dr J R Stockton wrote:
> On Tuesday, March 21, 2017 at 9:30:48 AM UTC, Evertjan. wrote:
> > Dr J R Stockton <J.R.Stockton@p*.o*> wrote on 21 Mar 2017 in 
> > comp.lang.javascript:


Similar to two days ago, but neatened, reporting versions, and done on 4 PCs -
I _guess_ that the discrepancy will vanish at 01:00 GMT on Sunday 26th.

8<------------------------------------------------------------------------

@echo # Batch file DATE-BUG.BAT, © JRS 2017-03-23+,
@echo # creating showing and executing DATE-BUG.JS, begins

@if exist DATE-BUG.JS 				       del DATE-BUG.JS
@echo   var WS = WScript.StdErr				>> DATE-BUG.JS
@echo   WS.WriteLine(					>> DATE-BUG.JS
@echo     "    Script Engine = " + ScriptEngine() +	>> DATE-BUG.JS
@echo     ", version = " + ScriptEngineMajorVersion() +	>> DATE-BUG.JS
@echo     "." + ScriptEngineMinorVersion() +		>> DATE-BUG.JS
@echo     ", build " + ScriptEngineBuildVersion())	>> DATE-BUG.JS
@echo   WS.WriteLine("    CMD.EXE says %date% %time%")	>> DATE-BUG.JS
@echo   WS.WriteLine("    WScript says " + new Date())	>> DATE-BUG.JS

@echo.^|
@echo * Script DATE-BUG.JS begins
@type DATE-BUG.JS
@echo * Script DATE-BUG.JS ends
@echo.^|

@ver
@echo COMPUTERNAME=%COMPUTERNAME%, OSVER=%OSVER%, VERSION=%VERSION%

@echo + Script DATE-BUG.JS output begins
@cscript //nologo DATE-BUG.JS
@echo + Script DATE-BUG.JS output ends
@del DATE-BUG.JS
@echo.^|
@echo # One hour error in UK time seen when US/UK GMT offset unusual?
@goto ZZZZ


On Thursday 23 Mar 2017 : US Summer Time, EU Winter Time
Testing in UK :-


Windows XP sp3 :-

Microsoft Windows XP [Version 5.1.2600]
COMPUTERNAME=MEL01421, OSVER=winXPP, VERSION=3.0.5.001
+ Script DATE-BUG.JS output begins
    Script Engine = JScript, version = 5.8, build 23259
    CMD.EXE says 2017-03-23 15:12:30.38
    WScript says Thu Mar 23 16:12:30 UTC+0100 2017
+ Script DATE-BUG.JS output ends


Windows 7 :-

Microsoft Windows [Version 6.1.7601]
COMPUTERNAME=MEL-1632, OSVER=, VERSION=
+ Script DATE-BUG.JS output begins
    Script Engine = JScript, version = 5.8, build 18618
    CMD.EXE says 2017-03-23 15:25:13.23
    WScript says Thu Mar 23 16:25:13 UTC+0100 2017
+ Script DATE-BUG.JS output ends
|

Windows 10 :-

Microsoft Windows [Version 10.0.14393]
COMPUTERNAME=FUJ-2012, OSVER=, VERSION=
+ Script DATE-BUG.JS output begins
    Script Engine = JScript, version = 5.8, build 16384
    CMD.EXE says 2017-03-23 15:33:24.81
    WScript says Thu Mar 23 16:33:24 UTC+0100 2017
+ Script DATE-BUG.JS output ends


Windows 10 :-

Microsoft Windows [Version 10.0.14393]
COMPUTERNAME=MEL01627, OSVER=, VERSION=
+ Script DATE-BUG.JS output begins
    Script Engine = JScript, version = 5.8, build 16384
    CMD.EXE says 2017-03-23 16:04:52.71
    WScript says Thu Mar 23 17:04:53 UTC+0100 2017
+ Script DATE-BUG.JS output ends



Javascript executed in MSIE in those systems here on the previous
Tuesday correctly used EU Winter Time.


So, we can say that, probably over the interval in which US & UK differ
as to whether it is Summer Time, 1/24 of the time JScript does not
even know which day of the week it is.

Summer Time note for WSOTP :
  NA from  2nd Sun Mar to  1st Sun Nov, change at 02:00 local;
  EU from last Sun Mar to last Sun Oct, change at 01:00 GMT.

:ZZZZ

@echo # Batch file DATE-BUG.BAT ends
@echo.

8<------------------------------------------------------------------------

-- 
  (c) John Stockton, near London, UK.  Using Google, no spell-check. |
 Mail: J.R.""""""""@physics.org                                      |

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#32846

On Thursday, March 23, 2017 at 4:22:15 PM UTC, Dr J R Stockton wrote:
> On Tuesday, March 21, 2017 at 7:29:15 PM UTC, Dr J R Stockton wrote:
> > On Tuesday, March 21, 2017 at 9:30:48 AM UTC, Evertjan. wrote:
> > > Dr J R Stockton <J.R.Stockton@p*.o*> wrote on 21 Mar 2017 in 
> > > comp.lang.javascript:
> 
> 
> Similar to two days ago, but neatened, reporting versions, and done on 4 PCs -
> I _guess_ that the discrepancy will vanish at 01:00 GMT on Sunday 26th.

Retested on all four PCs on Sunday afternoon.  Results are now correct.

-- 
  (c) John Stockton, near London, UK.  Using Google, no spell-check. |
 Mail: J.R.""""""""@physics.org                                      |

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#32847

Dr J R Stockton <J.R.Stockton@physics.org> wrote on 26 Mar 2017 in
comp.lang.javascript: 

> On Thursday, March 23, 2017 at 4:22:15 PM UTC, Dr J R Stockton wrote:
>> On Tuesday, March 21, 2017 at 7:29:15 PM UTC, Dr J R Stockton wrote:
>> > On Tuesday, March 21, 2017 at 9:30:48 AM UTC, Evertjan. wrote:
>> > > Dr J R Stockton <J.R.Stockton@p*.o*> wrote on 21 Mar 2017 in 
>> > > comp.lang.javascript:
>> 
>> 
>> Similar to two days ago, but neatened, reporting versions, and done on
>> 4 PCs - I _guess_ that the discrepancy will vanish at 01:00 GMT on
>> Sunday 26th. 
> 
> Retested on all four PCs on Sunday afternoon.  Results are now correct.

Would this have helped, I use it serverside for servers in Toronto:

let timeZoneOffsetHours = new Date().getTimezoneOffset()/60;

-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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#32858

On Sunday, March 26, 2017 at 4:42:29 PM UTC+1, Evertjan. wrote:
> Dr J R Stockton <J.R.S......n@phisycs.awg> wrote on 26 Mar 2017 in
> comp.lang.javascript: 

> > Retested on all four PCs on Sunday afternoon.  Results are now correct.
> 
> Would this have helped, I use it serverside for servers in Toronto:
> 
> let timeZoneOffsetHours = new Date().getTimezoneOffset()/60;

I've put it on (with /-60 - the cack-handed US programmers should have
programmed it as offset *from* GMT) - but it only helps for those who know
what their offset should be and I think the error is made more obvious by
showing the times.

Readers be aware that, although Brazil mostly changes the clocks in
Spring and Autumn with dates given by rules like ours, there is a
one-week postponement every few years in places like Sao Paulo.
Microsoft may not know that.

-- 
  (c) John Stockton, near London, UK.  Using Google, no spell-check. |
 Mail: J.R.""""""""@physics.org                                      |

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#32828

Dr J R Stockton wrote:

> Note date/time of posting.
> 
> Please test in Europe while still Winter Time, and in US/CA  !!
> 
> My Location : Greater London
> Op Sys : Win XP sp3, up-to-date

“up-to-date” is relative.  There has not been a significant update for 
Windows XP, including its JScript engine, since 2014-05-01 when there had 
been, unusually, an emergency security patch released after the OS’s end-of-
life (end of the Extended Support phase) on 2014-04-08.  The final update 
was for its Security Essentials virus definitions and Malicious Software 
Removal Tool in 2015-07.

,-<https://en.wikipedia.org/wiki/Windows_XP#End_of_support>
| 
| […]
| Windows XP is remotely exploitable by numerous security holes that were 
| discovered after Microsoft stopped supporting Windows XP.

-- 
PointedEars
FAQ: <http://PointedEars.de/faq> | <http://PointedEars.de/es-matrix>
<https://github.com/PointedEars> | <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.

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