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→Approaches to Y2K Remediation
==Approaches to Y2K Remediation==
==Approaches to Y2K Remediation==
The optimal approach to Y2K remediation is to change all date references to use 4-digit years instead of 2-digit ones, and revise any date-based calculations accordingly.
If this is not possible or practical, then the century needs to be implied based on the value of a 2-digit year and its context. For example, a system tracking new 30-year mortgages with a maturity date from "00" to "49" can safely assume the century to be "20" ,with "19" used for the other values. For birth dates the logic is not as simple - a birth date of "99" could mean "1999" or "1899", so you need to know if your system deals with adults, infants or both before determining a fix. With this approach, date calculations also have to be checked so they work properly when the dates in a formula span centuries.
Another option for Y2K remediation is to use serial dates instead of calendar dates. In computing, a serial date is represented as the number of days since a base date like 1/1/1900, or 01/01/0001. While these dates have to be converted to and from Gregorian dates for display on screens and reports, they allow thousands of years worth of dates to be stored using the original 6-digit storage space, and performing date-based math is easy.
==Challenges in Y2K Remediation==
==Challenges in Y2K Remediation==