EXPDT

Specifies the expiration date to be placed on the tape data set being created.

yyddd: Specifies an expiration date for the tape data set as a two‑digit designation for the year and a three‑digit designation for the day of the year. For example, in the expiration date 09021, 09 is the year (namely, 2009), and 021 is the 21st day of that year. The tape data set will expire on January 21, 2009.
yyyy/ddd: Specifies an expiration date for the tape data set in terms of a four‑digit designation for the year and a three‑digit designation for the day of the year. For example, in the expiration date 2009/021, 2009 is the year, and 021 is the 21st day of that year. The tape data set will expire on January 21, 2009.

Note: EXPDT and RETPD are mutually exclusive; specify one or the other.