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Browse Prior Art Database

Recorded Historical Date Support to Calibrate Multiple Calendar Type Changes

IP.com Disclosure Number: IPCOM000107274D
Original Publication Date: 1992-Feb-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 3 page(s) / 105K

Publishing Venue

IBM

Related People

Bacon, JS: AUTHOR [+6]

Abstract

A method for calibrating the algorithms of a given calendar type to a date line is disclosed. This method allows one to accurately store, define or manipulate date values to the realities of history. TERMINOLOGY JOSEPH SCALIGER--In 1583 Gregorian, Joseph Scaliger developed a system to place all known dates of past and present civilizations on a time- line that was chronologically correct. A system of a monotonic progression of days and fractions of days from some arbitrary point in time was used. DATE LINE--A line consisting of the integer numbering system in which each number represents a solar day. HISTORICAL CALENDAR CALIBRATION TABLE (HCCT)--HCCT defines a date line that describes when history starts and ends, and a place holder indicating when each type of calendar format takes effect within that date line.

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Recorded Historical Date Support to Calibrate Multiple Calendar Type Changes

       A method for calibrating the algorithms of a given
calendar type to a date line is disclosed.  This method allows one to
accurately store, define or manipulate date values to the realities
of history.
TERMINOLOGY
JOSEPH SCALIGER--In 1583 Gregorian, Joseph Scaliger developed a
system to place all known dates of past and present civilizations on
a time- line that was chronologically correct.  A system of a
monotonic progression of days and fractions of days from some
arbitrary point in time was used.
DATE LINE--A line consisting of the integer numbering system in which
each number represents a solar day.
HISTORICAL CALENDAR CALIBRATION TABLE (HCCT)--HCCT defines a date
line that describes when history starts and ends, and a place holder
indicating when each type of calendar format takes effect within that
date line.
MODIFIED SCALIGER NUMBER--A whole number which represents a count of
solar days from an arbitrary known origin on the date line.  The
number's granularity is to the whole day, fractions of a day are not
represented.  This modified Scaliger number is called a SCALIDAY
throughout this article and named in homage to Joseph Scaliger.
DATE STRING--A character string of symbols that represents a given
solar day on the date line.
CALENDAR CODE--The Calendar Code is the linkage that the computer
uses to associate a particular Date String of symbols to their
historical/ cultural calendar type....