I think its just that any instance of 31 days would be translated in to a
month, so it would not be valid in a years/months/days difference value.

Some instances of 28,29, and 30 would also be invalid at certain points you
would think.  That is part of the confusion in trying to arrive at such a
value.

Bob Comeau
Sr. Systems Programmer Analyst
Crossley Carpet Mills Ltd.
(902)895-5491 ex 139


-----Original Message-----
From: HP-3000 Systems Discussion [mailto:[log in to unmask]]On
Behalf Of Matthew Perdue
Sent: February 10, 2006 4:38 AM
To: [log in to unmask]
Subject: Re: HP COBOL routine to calculate the difference between 2
dates


Quoting Walter Murray <[log in to unmask]>:

> In an earlier posting, I wondered aloud whether there were a rigorous
> definition of the difference between two dates, in years, months, and
> days.
>
> I did check ISO 8601, which is a standard for date representation.  It
> did state one requirement to be met when expressing a time period in
> years, months, and days:  months must not be greater than 11, and days
> must not be greater than 30.  That's all I could find.
>
> Walter

Huh? Have I missed something here or did December and any months with 31
days
just  cease to be able to be represented digitally according to ISA 8601?

* To join/leave the list, search archives, change list settings, *
* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *

* To join/leave the list, search archives, change list settings, *
* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *