Converting Julian Dates to Gregorian Dates

Question:
How do I change a Julian date to a Gregorian date and remain Y2K compliant?

Answer:
I am not sure how the year is stored in the Julian date, so I will suppose that it is at the beginning of the Julian string for the sake of this solution. I will also assume that the Julian date is stored as a character value.

Let’s assume there is a Julian date 1999003, which would be Jan 3, 1999. Create a PRG file with the following code in it:

?ConvertJulianToDate("1999003") PROCEDURE ConvertJulianToDateLPARAMETERS tcJulianDateLOCAL lcJulianYear,lcJulianNumberLOCAL lnJulianNumber, ldReturnValuelcJulianYear = LEFTC(tcJulianDate,4)lcJulianDay  = RIGHTC(tcJulianDate,3)lnJulianDay  = VAL(lcJulianDay)*-- Create a date that is Jan 1st of Julian yearldReturnValue = CTOD("01/01/"+lcJulianYear)*-- Add the numeric Julian date and subtract*-- one because Jan 1 = 1, not zeroldReturnValue = ldReturnValue + lnJulianDay - 1RETURN ldReturnValueENDPROC

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a

chrome os developer mode

How to Turn on Chrome OS Developer Mode

Google’s Chrome OS is a popular operating system that is widely used on Chromebooks and other devices. While it is designed to be simple and user-friendly, there are times when users may want to access additional features and functionality. One way to do this is by turning on Chrome OS