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From: "G.B." <bauhaus@notmyhomepage.invalid>
Newsgroups: comp.lang.ada
Subject: Re: Trivial question: how to avoid confusing sec, min, hour and day
 in a program?
Date: Sun, 24 Oct 2021 12:08:12 +0200
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On 24.10.21 08:52, reinert wrote:
> Ada seems to guarantee that Duration covers 24 hours (?). What you do when you need to represent for example 5 years?

The computing apparatus running the program  might not always be on.
"Always" is a reference to real time. So when it's turned off,
a duration object in the program would incur lost time.

So, some form of persistent storage is needed. I'd use values of types
that allow computing offsets in time. Store these every now and then,
e.g., as representing time passed.