Year 2070 problem

The Year 2070 problem, or Y2.07K problem [ [http://mail.python.org/pipermail/python-list/2002-November/170513.html Date/Time Conversion] , a posting to the Python mailing list by Mike Brown, 8 November 2002.] , is a jargon name given to a limitation of the 2-digit year number encoding.

Computer programs might be written in a belief that users will never enter dates before year 1969 or after year 2068. [ [http://www.opengroup.org/onlinepubs/000095399/utilities/date.html date - write the date and time] , The Open Group Base Specifications Issue 6. IEEE Std 1003.1, 2004 Edition] But users might have their own assumption about the roll-over boundary or none at all. As a result of insufficient information, decoding of the 2-digit year number will produce an incorrect date.

For example, a person might enter 34 as a shortcut to the birth year 1934. The software might interpret the number 34 as year 2034.

The problem is named after the most common 2-digit rollover boundary. The choice of the boundary will not affect the limited 100-year span of the 2-digit encoding.

References

See also

* Time formatting and storage bugs
* Year 2000 bug