Abstract: A memory media and method of processing date data expressed in a pseudo zoned decimal format The pseudo zoned decimal format differs from the zoned decimal format in that the value of a character contained in the higher order field that corresponds to the F character of the zoned decimal format is permitted to vary in hexidecimal value from 0 to E to represent century information, but is not permitted to have a value of F. This character is examined to detect whether its value is F or a value in the range from 0 to E. If the value is F, the year data is converted to pseudo zoned decimal format in accordance. with century data. If the value is in the range from 0 to E, the value is added to a base century to obtain the proper century.

Abstract: A method, apparatus, and article for solving the year 2000 problem involve processing a computer object program to identify object code instructions referencing date information for an operation which involves more than one century. The object code is altered by altering each identified instruction with an instruction to effect a transfer of control to a Year 2000 routine. The Year 2000 routine is a routine for altering the execution of an identified instruction in accordance with the Year 2000 routine and thereafter returning control to the object code.