What are some other way to rewrite this if block?

[Chris Angelico]

On Tue, Mar 19, 2013 at 2:10 AM, Steven D'Aprano
<steve+comp.lang.python at pearwood.info> wrote:
> A third weakness is that you can't allow for arrivals more than 12 hours
> early or late.

Oh, but that'll NEVER happen.

Oh wait, I've been on a service that was 12 hours late.

Is there any chance that you could do your times of arrival and
expectation in, say, integer seconds since 1970?

ChrisA