[Ietf-calsify] PERIOD types

[Sam Roberts]

Quoting reinhold at kainhofer.com, on Tue, Apr 12, 2005 at 12:28:18AM +0200:
> >         And lets say that 1W == 7D.
> 
> Yes, that's clear, because no weekdays are skipped or added, even in leap 
> years.

But only if a day is really a day, and not 24 hours/24*60*60 secs!

Btw, my interpretation is like yours. When you add a year, you get the
same date and time, one year later irrespective of leap years.

When you add a day, you get the same time, one day later, irrespective
of DST shifts.

That was easy to implement. The only oddities are when I arrive at a
time that doesn't exist on a particular day.

Sam