From: Hirotsugu Asari <asari.ruby@...>
Date: 2010-06-09T07:34:16+09:00
Subject: [ruby-core:30680] Re: [Bug #3411] Time.local 1916,5,1 #=>  1916-04-30 23:00:00 +0100


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On Jun 8, 2010, at 4:06 PM, Benoit Daloze wrote:

>> Then maybe it is a platform problem
>> or a zone problem (you are in -5, so it is likely not happening).
>> Could someone checks on OSX with trunk and 1.9.2 ?
>>=20
>> For my part I still get:
>> $ ruby -e 'p Time.local 1916,5,1'
>> 1916-04-30 23:00:00 +0100
>=20
> To clarify the problem: (first build from adding a day(86400), second
> from Time.local)
>> 5.times {|i| t=3DTime.local(1916,4,29)+i*86400; p t; d=3Di>1 ? =
Time.local(1916,5,i-1) : Time.local(1916,4,29+i); p d; puts}
> 1916-04-29 00:00:00 +0100
> 1916-04-29 00:00:00 +0100
>=20
> 1916-04-30 00:00:00 +0100
> 1916-04-30 00:00:00 +0100
>=20
> # So the time zone changes, and this probably cause the bug.
> 1916-05-01 01:00:00 +0200
> 1916-04-30 23:00:00 +0100
>=20
> 1916-05-02 01:00:00 +0200
> 1916-05-02 00:00:00 +0200
>=20
> 1916-05-03 01:00:00 +0200
> 1916-05-03 00:00:00 +0200
>=20


I think this is most definitely a time zone thing:

$ uname -a; TZ=3DEurope/Amsterdam ruby1.9 -e 'p Time.local 1916,5,1'
Darwin aotearoa.local 10.3.0 Darwin Kernel Version 10.3.0: Fri Feb 26 =
11:58:09 PST 2010; root:xnu-1504.3.12~1/RELEASE_I386 i386
1916-04-30 23:00:00 +0020

Besides Europe/Amsterdam, Asia/Istanbul and Europe/Brussels return this =
result on my machine.=

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<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><br><div><div>On Jun 8, 2010, at 4:06 PM, Benoit Daloze =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div><blockquote type=3D"cite">Then maybe it is a platform =
problem<br></blockquote><blockquote type=3D"cite">or a zone problem (you =
are in -5, so it is likely not happening).<br></blockquote><blockquote =
type=3D"cite">Could someone checks on OSX with trunk and 1.9.2 =
?<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">For my part I still get:<br></blockquote><blockquote =
type=3D"cite">$ ruby -e 'p Time.local =
1916,5,1'<br></blockquote><blockquote type=3D"cite">1916-04-30 23:00:00 =
+0100<br></blockquote><br>To clarify the problem: (first build from =
adding a day(86400), second<br>from Time.local)<br><blockquote =
type=3D"cite">5.times {|i| t=3DTime.local(1916,4,29)+i*86400; p t; =
d=3Di&gt;1 ? Time.local(1916,5,i-1) : Time.local(1916,4,29+i); p d; =
puts}<br></blockquote>1916-04-29 00:00:00 +0100<br>1916-04-29 00:00:00 =
+0100<br><br>1916-04-30 00:00:00 +0100<br>1916-04-30 00:00:00 =
+0100<br><br># So the time zone changes, and this probably cause the =
bug.<br>1916-05-01 01:00:00 +0200<br>1916-04-30 23:00:00 =
+0100<br><br>1916-05-02 01:00:00 +0200<br>1916-05-02 00:00:00 =
+0200<br><br>1916-05-03 01:00:00 +0200<br>1916-05-03 00:00:00 =
+0200<br><font class=3D"Apple-style-span" color=3D"#000000"><font =
class=3D"Apple-style-span" =
color=3D"#144FAE"><br></font></font></div></blockquote></div><div><br></di=
v><div>I think this is most definitely a time zone =
thing:</div><div><br></div><div><div>$ uname -a; TZ=3DEurope/Amsterdam =
ruby1.9 -e 'p Time.local 1916,5,1'</div><div>Darwin aotearoa.local =
10.3.0 Darwin Kernel Version 10.3.0: Fri Feb 26 11:58:09 PST 2010; =
root:xnu-1504.3.12~1/RELEASE_I386 i386</div><div>1916-04-30 23:00:00 =
+0020</div></div><div><br></div><div>Besides =
Europe/Amsterdam,&nbsp;Asia/Istanbul and Europe/Brussels return this =
result on my machine.</div></body></html>=

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