Julian Date Handlers Available For Testing

[Rob Cozens]

Hi All,

In preparation for conversion of my HyperCard biorhythm charter to 
Run Rev without having to deal with the centuryCutoff issues and 
other xTalk date anomalies, I have added six Julian (YYYYDDD) date 
handler functions to Serendipity Library:

* dateItemsToJulian(theDateItems)  --  returns the equivalent Julian date

* julianDaysBetween(firstJulianDate,secondJulianDate)  --  returns 
the number of days between two dates

* julianDaysHence(julianDate,numberOfDays) -- returns the Julian date 
numberOfDays after [before if numberOfDays is negative] the original 
date

* julianToDateItems(theJulianDate) --  returns the Julian date in dateItems

* julianToSystemDate(theJulianDate)  --  returns the Julian date 
(including century) in system date format

*  systemDateToJulian(theDate)  --  returns the equivalent Julian date

If anyone has a need to manipulate dates that don't fall nicely 
within one century, contact me privately and I'll be happy to extract 
these & supporting handlers from Serendipity Library and provide them 
for testing in greater depth.
-- 

Rob Cozens
CCW, Serendipity Software Company
http://www.oenolog.net/who.htm

"And I, which was two fooles, do so grow three;
Who are a little wise, the best fooles bee."

from "The Triple Foole" by John Donne (1572-1631)