From: Brian Candler <lists@...>
Date: 2012-12-12T01:26:24+09:00
Subject: Re: Time.new(2001, 12, 3).to_i returns wrong value

Robert Buck wrote in post #1088400:
> Time.new(2001, 12, 3).to_i
>
> According to international standards this OUGHT to return 1007337600,
> but no, it returns 1007355600, despite the Ruby documentation stating
> that the to_i method is supposed to return seconds since the Epoch.

It does construct the epoch time, but in this case interprets the Y/M/D 
you are passing in as for midnight in the local timezone.

Just use the method which does what you want, which in this case is 
Time.gm

>> ENV['TZ']="Etc/GMT-5"
=> "Etc/GMT-5"
>> a = Time.mktime(2001,12,3)
=> Mon Dec 03 00:00:00 +0500 2001
>> a.to_i
=> 1007319600
>> b = Time.gm(2001,12,3)
=> Mon Dec 03 00:00:00 UTC 2001
>> b.to_i
=> 1007337600

[tested with ruby 1.8]

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