A
CADEMIC
C
OMPUTING and
C
OMMUNICATIONS
C
ENTER
ISO 8601 Dates: What They Are and How to Use Them
Contents
1. What They Are
2. In Programs
3. In Output
4. On Personal Computers
5. Fix Data/Programs
A1. Important Dates
A2. Leap Years
A3. A Y2K Parable
ISO 8601 Dates: What They Are and Why They're Good
ISO 8601: The Right Format for Dates
Wanted: An Unambiguous Numerical Format for Dates
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ISO Standard 8601 for Dates (and Times)
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Written Dates: Unambiguous But Not Useful for Data
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Unambiguous Around the World
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For a Good Time
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For More Information about Date Formats
Using ISO 8601 (yyyy-mm-dd) Dates in Programs
SPSS
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SAS
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Rexx Programs
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C Programs
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Fortran Programs
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Perl Programs
Getting ISODATE Formatted Output
From SAS
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From SPSS
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From C Programs
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From Fortran Programs
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From Perl Programs
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From Rexx Programs
Setting ISODATE formats for Personal Computer Operating Systems
Windows 3.1
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Windows 95/98/NT
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OS/2 Warp
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DOS
Identifying and Correcting Dates with Two-Digit Years
Pinpointing the Problems
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-- Finding Year Problems in Programs
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Remediation
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-- Fixing File Names that Are Dates
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-- Fixing Two-Digit Years at the Data Source
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And What If That Cannot Be Done?
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External Windowing: How Statistical Packages Handle Two-Digit Years
Appendix 1: Dates with Special Importance in Computing
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Dates Before the Year 2000
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Dates In the Year 2000
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It's Not Enough to Get Through February 29, 2000
Appendix 2: All About Leap Years
Why We Have Leap Years
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Rules for Calculating Leap Years in the Gregorian Calendar
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How to Test Your Programs for the Leap Year Problem:
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References:
Appendix 3: The Case of the 100-Year-Old Babies
Using ISO 8601 Dates
Next:
1. What They Are
2001-12-21
ACCC Documentation
