Re: Newbie Q: How to program in UTC (time/calendar) ?

[reinkor <reinkor@gmail.com>]

Given the following Ada code:

with Text_IO,Ada.Calendar,Ada.Calendar.Formatting;
use  Text_IO,Ada.Calendar,Ada.Calendar.Formatting;
procedure t1 is

  package Int_Io  is new Text_IO.Integer_Io (Integer);
  use Int_Io;

  Time1 : Time;

begin

   Time1 := Value("1970-01-01 00:00:00");
   Put(Image(Time1));New_Line;
   Put(Image(Ada.Calendar.Time_Of(1970,1,1,Duration(0))));

end t1;

This gives (on my linux computer):

1970-01-01 00:00:00
1969-12-31 23:00:00

The last output line here reflects the fact that Ada takes
"local time" from the computer - and the result would be
different if I wait to run my program till next Monday
(this weekend we change to summer daylight saving time).

I would expect that time zones should be explicite - and this would
help programmers to avoid misstakes (which is an argument for Ada).
I made and error due to this my confusion - am I just to much of a
newbie ?

reinert