From mboxrd@z Thu Jan  1 00:00:00 1970
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From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Dates and Times in GNAT on Linux
Date: Sun, 13 Sep 2009 12:35:37 -0700
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Date: 2009-09-13T12:35:37-07:00
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Marc A. Criley wrote:
> 
> I can then get the start of the Unix/UTC epoch via:
>    UTC_Epoch_Start := Calendar.Time_Of(1970, 1, 1)
>                         + Duration(Calendar.Time_Zones.UTC_Offset * 60);
>    -- For where I live, right now the UTC_Offset is -300 minutes,
>    -- i.e. -5 hours.

This is your problem. The offset on 1970 Jan 01 00:00:00.00 was -6 hrs.

Of course, any attempt to relate an Ada.Real_Time.Time to an Ada.Calendar.Time 
is completely compiler dependent, is unlikely to work with any other compiler, 
and could stop working with a different version of the same compiler.

-- 
Jeff Carter
"C++: The power, elegance and simplicity of a hand grenade."
Ole-Hjalmar Kristensen
90