The Year 2070 problem, or Y2. 07K problem, 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. 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.

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  • The Year 2070 problem, or Y2. 07K problem, 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. 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. (en)
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  • The Year 2070 problem, or Y2. 07K problem, 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. 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. (en)
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  • Year 2070 problem (en)
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