Graphic 21st Aid
British Standards Institution document
DISC PD2000-1

MST TRANSLATION
THE DEFINITION

Year 2000 conformity shall mean that neither performance nor functionality is affected by dates prior to, during and after the year 2000.

In particular:
Rule 1. No value for current date will cause any interruption in operation.
Rule 2. Date-based functionality must behave consistently for dates prior to, during and after year 2000.
Rule 3. In all interfaces and data storage, the century in any date must be specified either explicitly or by unambiguous algorithms or inferencing rules.
Rule 4. Year 2000 must be recognized as a leap year.


HANDLING OF DATES MUST NOT AFFECT THE PROPER PERFORMANCE OF YOUR COMPUTER SYSTEMS

AMPLIFICATION OF THE DEFINITION AND RULES

General Explanation
Problems can arise from some means of representing dates in computer equipment and products and from date-logic embedded in purchased goods or services, as the year 2000 approaches and during and after that year. As a result, equipment or products, including embedded control logic, may fail completely, malfunction or cause data to be corrupted.

THERE IS A SERIOUS PROBLEM IN THE WAY COMPUTERS HANDLE DATES
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