Subparameter definition

yyddd

This form of the expiration date specifies a two-digit year number yy (from 00 through 99) and a three-digit day number ddd (from 001 through 365 for a non-leap year date, from 001 through 366 for a leap year date). For example, code February 2, 1999 as EXPDT=99033, and code December 31, 1996 as EXPDT=96366.

Note: For expiration dates of January 1, 2000 and later, you MUST use the form EXPDT=yyyy/ddd.

Note: Expiration dates of 99365 and 99366 are considered “never-scratch” dates. Data sets with these expiration dates are not deleted or written over.

yyyy/ddd

This form of the expiration date specifies a four-digit year number yyyy (from 1900 through 2155) and a three-digit day number ddd (from 001 through 365 for a non-leap year date, from 001 through 366 for a leap year date). For example, code February 2, 1999 as EXPDT=1999/033, and code December 31, 2000 as EXPDT=2000/366.

Note: Expiration dates of 1999/365 and 1999/366 are considered “never-scratch” dates. Data sets with these expiration dates are not deleted or written over.

You may specify the years from 1900. However, if you specify the current date or an earlier date, the data set is immediately eligible for replacement.