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<div class="moz-cite-prefix">Thanks Ross,<br>
<br>
however I would dispute that windows stores file timestamps in
utc. Because twice a year there is mayhem as only some files
change their timestamp by an hour. And these files are different
on different workstations.<br>
<br>
Maybe it's true for the server version of windows.<br>
<br>
Rohit<br>
<br>
<br>
On 24/11/2016 17:39, Ross Levis wrote:<br>
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">I
suggest store in UTC, like Windows does for file timestamps,
and use Windows functions like GetTimeZoneInformation and
SystemTimeToTzSpecificLocalTime to convert to locale time
for display/printing purposes. A timezone database
shouldn’t be required.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US"> <a class="moz-txt-link-abbreviated" href="mailto:delphi-bounces@listserver.123.net.nz">delphi-bounces@listserver.123.net.nz</a>
[<a class="moz-txt-link-freetext" href="mailto:delphi-bounces@listserver.123.net.nz">mailto:delphi-bounces@listserver.123.net.nz</a>] <b>On
Behalf Of </b>Stefan Mueller<br>
<b>Sent:</b> Thursday, 24 November 2016 5:21 p.m.<br>
<b>To:</b> 'NZ Borland Developers Group - Delphi List'<br>
<b>Subject:</b> Re: [DUG] Timezones for Bills and things<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><a moz-do-not-send="true"
href="https://github.com/pavkam/tzdb">https://github.com/pavkam/tzdb</a>
has such a timezone database (2014 data). Using that library
makes it easy to convert between timezones.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">I think <a moz-do-not-send="true"
href="http://www.iana.org/time-zones">http://www.iana.org/time-zones</a>
hosts the latest up to date time zone data that this tzdb
database is based on in case you want to update it to the
latest 2016 data. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Or you could rewrite your application to use
Oracle Database … they do have a timestamp datatype for your
table columns so when you select/insert/update a table all
you need to do is to set the correct locale and the database
will do the conversion for you.<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""
lang="EN-US"><a moz-do-not-send="true"
href="https://docs.oracle.com/database/121/NLSPG/ch4datetime.htm#NLSPG263">https://docs.oracle.com/database/121/NLSPG/ch4datetime.htm#NLSPG263</a><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""
lang="EN-US">Kind regards,</span><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""
lang="EN-US">Stefan Müller</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""
lang="EN-US">,<br>
R&D Manager</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
lang="EN-US"><br>
<br>
</span><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:white;background:red"
lang="EN-US">ORCL</span></b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""
lang="EN-US">Toolbox Ltd.</span></b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> <br>
</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""
lang="EN-US">Auckland, New Zealand</span><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:Webdings;color:#777777"
lang="EN-US"><br>
P</span><span
style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#777777"
lang="EN-US"> Please consider the environment before
printing this email<br>
<br>
This message is intended for the adresse named above and
may contain privileged or confidential information.<br>
If you are not the intended recipient of this message you
must not use, copy, distribute or disclose it to anyone.<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US"> <a moz-do-not-send="true"
href="mailto:delphi-bounces@listserver.123.net.nz">delphi-bounces@listserver.123.net.nz</a>
[<a moz-do-not-send="true"
href="mailto:delphi-bounces@listserver.123.net.nz">mailto:delphi-bounces@listserver.123.net.nz</a>]
<b>On Behalf Of </b>Rohit Gupta<br>
<b>Sent:</b> Thursday, 24 November 2016 4:19 p.m.<br>
<b>To:</b> NZ Borland Developers Group - Delphi List<br>
<b>Subject:</b> [DUG] Timezones for Bills and things<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
lang="EN-US">We finally have to deal with time zones. We
use the server date-time everywhere, rather than relying on
workstation date-times. This is not an interactive forum
type application where the flow of data is merged from
various timezones. It is a business management system with
appointments and bills etc. The timestamps of these records
have to remain as created. But they can not come from the
workstation clock.<br>
<br>
Going forward, a database server could be servicing
workstations in different time zones.<br>
<br>
I am considering<o:p></o:p></span></p>
<ol start="1" type="1">
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3"><span lang="EN-US">Set the server time as UTC<o:p></o:p></span></li>
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3"><span lang="EN-US">Keep a table for time zone
versus branch (how do I keep this upto date at daylight
saving boundaries)<o:p></o:p></span></li>
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3"><span lang="EN-US">Use the utc + timezone
difference to stamp each bill or appointment made for each
branch.<o:p></o:p></span></li>
</ol>
<p class="MsoNormal"><span lang="EN-US">How is everyone else
handling it ?<br>
<br>
Regards<br>
<br>
Rohit<o:p></o:p></span></p>
</div>
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</p>
<div class="moz-signature">-- <br>
<p>
Regards<br>
<br>
<b>Rohit Gupta</b><br>
B.E. Elec., M.E., Mem IEEE, Mem IET<br>
Technical Director<br>
Computer Fanatics Ltd<br>
<br>
<b>Tel </b>4892280 <br>
<b>Fax </b>4892290 <br>
<b>Web </b><a href="www.cfl.co.nz">www.cfl.co.nz</a><br>
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