[cabfpub] Durations

[Doug Beattie]

Maybe we should use Epoch time?  Not much room for interpretation there.

If my calculations are right:
- earlier today: 1486648303
- Plus 13 months: 1520603443
- Difference: 33955140

http://www.epochconverter.com/

Doug

> -----Original Message-----
> From: Public [mailto:public-bounces at cabforum.org] On Behalf Of Peter Bowen
> via Public
> Sent: Monday, February 6, 2017 10:24 AM
> To: CA/Browser Forum Public Discussion List <public at cabforum.org>
> Cc: Peter Bowen <pzb at amzn.com>
> Subject: Re: [cabfpub] Durations
> 
> 
> > On Feb 6, 2017, at 7:02 AM, Ryan Sleevi via Public <public at cabforum.org>
> wrote:
> >
> > However, because there's any interpretation involved at all, I'm happy
> > to defer to days, with the clarification that any difference in the
> > time period as well becomes considered a full day as well
> >
> > That is
> >
> > Jan 1 00:00:00 -> Jan 2 00:00:00 == 1 day Jan 1 00:00:00 -> Jan 2
> > 00:00:01 > 1 day
> >
> > (And luckily, the same doesn't have to be said about fractional
> > microseconds)
> 
> I was hoping to not raise the issue, but some minutes have more than 60
> seconds.  Given that certificate notBefore/notAfter are specified to the second,
> this can cause the number of SI days to be slightly over.  As long as 00:00:00 to
> 00:00:00 is always one day we are fine, but anyone implementing
> number_of_seconds/86400 needs to ensure an extra 0.0000347 days does not
> trip the rule unexpectedly.
> 
> Thanks,
> Peter
> 
> 
> 
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