RE: Duration: Does 1 day == 24 hours?

[Alan Davies <aland@xxxxxxxxxxx>]

At 11:48 2001-03-28 -0600, you wrote:
> DTSTART;VALUE=DATE:20010328
> DURATION:P1D

Yes the duration of this event is one whole day (24/25
hours, but that's another issue).

> I disagree. As evidence, how would you interpret a DURATION:P1M? Is it 30
> day*24 hours? Or is it 28, 29 or 31? And what do you do for the other
> calendar specific forms of DURATION values?

Nothing above a week is mentioned in RFC2445 4.3.6.

> The time specific values provide clock based granularity. The calendar
> specific value provide date based granularity. To take the latter and turn
> it into the former defeats the benefits of this type of DURATION.

but RFC2445 gives a duration example that combines both: P15DT5H0M20S

How should this be interpreted- does a day have a different
meaning when used with and without a time?

--Alan