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<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=276105613-03022005>Yuming is not on the time zone mailing list; direct
replies appropriately.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=276105613-03022005></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=276105613-03022005>
--ado</SPAN></FONT></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> Fei Yuming-CYF001
[mailto:Yuming.Fei@motorola.com] <BR><B>Sent:</B> Tuesday, February 01, 2005
4:14 PM<BR><B>To:</B> 'tz@elsie.nci.nih.gov'<BR><B>Subject:</B> glibc, Linux:
about the time zone transition values in the localt ime
file<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT face=Arial size=2><SPAN class=210183820-01022005>Dear
Sir:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=210183820-01022005></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=210183820-01022005>On Linux systems, it
seems that the transitions stored in the localtime file are not the current time
to start the transition, but the new local current time right after the
transition.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=210183820-01022005></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=210183820-01022005>For example, I have
the glibc-2.2.5 library on my Linux 2.4.20 system, my timezone is set to
US/Central and my current time is in CST. The /etc/localtime (or
/usr/share/zoneinfo/US/Central) shows that in 2005, the time to transfer
into DST is 1112515200 seconds, i.e. Sun Apr 3 <STRONG>03:00:00</STRONG> 2005.
(This can be got, e.g., by breaking into the glibc-2.2.5/time/tzfile.c's
__tzfile_read() function, and printing out the transitions values, i.e.
transitions[169] == 1112515200).</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=210183820-01022005></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=210183820-01022005>However, as we know,
the transition to DST is Apr 3 <STRONG>02:00:00</STRONG> --> Apr 3
03:00:00. The time after the transition (i.e. 03:00:00) instead of
the current time to start the transition (ie.. 02:00:00) has been stored in the
localtime file. Could you please let me know what the reason it is to do so
(i.e. why not storing 02:00:00)?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=210183820-01022005></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=210183820-01022005>I will highly
appreciate your help!</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=210183820-01022005>Yuming
</SPAN></FONT></DIV></BODY></HTML>