[ruby-core:30680] Re: [Bug #3411] Time.local 1916,5,1 #=> 1916-04-30 23:00:00 +0100

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 ?
>> 
>> For my part I still get:
>> $ ruby -e 'p Time.local 1916,5,1'
>> 1916-04-30 23:00:00 +0100
> 
> To clarify the problem: (first build from adding a day(86400), second
> from Time.local)
>> 5.times {|i| t=Time.local(1916,4,29)+i*86400; p t; d=i>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
> 
> 1916-04-30 00:00:00 +0100
> 1916-04-30 00:00:00 +0100
> 
> # 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
> 
> 1916-05-02 01:00:00 +0200
> 1916-05-02 00:00:00 +0200
> 
> 1916-05-03 01:00:00 +0200
> 1916-05-03 00:00:00 +0200
> 


I think this is most definitely a time zone thing:

$ uname -a; TZ=Europe/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.