RE: Date field's and their file space usage.

It was well over a century for the Gregorian calendar to take hold :) .
Some parts of the world didn't adopt it until the 20th century and even the
United States (or rather Britain to be historically correct) wasn't until
1752...

As for Scaliger, here's some information:
http://www.sizes.com/time/dayJulianr.htm



                                                                           
             "Joe Lee"                                                     
             <LeeJD@xxxxxx>                                                
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             01/11/2005 02:44          RE: Date field's and their file     
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Introduced where, I seem to remember that it took well over a century
for it to be generally adopted. Figuring out what a given date from that
time period really means is interesting at best. :)

Joe Lee

>>> Matt.Haas@xxxxxxxxxxx 01/11/2005 12:37:23 >>>
October 14, 1582 is when the Gregorian calendar was introduced.

Matt

-----Original Message-----
From: Joe Lee [mailto:LeeJD@xxxxxx]
Sent: Tuesday, January 11, 2005 3:27 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: RE: Date field's and their file space usage.


4713 BCE? why not 4712 or 4714? For that matter why October 14, 1582?
At
least the Unix date time values with a base of January 1, 1970 makes
some sense, but who came up with these other base dates, and why?

Joe Lee

>>> cozzi@xxxxxxxxx 01/11/2005 12:18:06 >>>
Yes, I know/knew about the scaliger number but didn't want to use big
words.
<vbg>

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Bruce Vining
Sent: Tuesday, January 11, 2005 1:01 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Date field's and their file space usage.





> Date fields are all stored internally as a 4-byte integer. The value
stored
> is the number of days since January 1, 0001 or October 14, 1582, I'm
not
> sure which it is.

A minor point but date fields are actually stored using Scaliger
numbers
which have a base of January 1 4713 BCE.

October 14 1582 is the base date for Lilian numbers which are used by
the
ILE CEE Date APIs.

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