These variables specify a two-digit year date field in the input record to be compared either to another two-digit year date field in the input record or to a two-digit year date constant.

• p1 specifies the first byte of the date field relative to the beginning of the input record.¹ The first data byte of a fixed-length record (FLR) has relative position 1. The first data byte of a variable-length (VLR) record has relative position 5 (because the first 4 bytes contain the record descriptor word). All date fields must start on a byte boundary, and no date field can extend beyond byte 32752.
• m1 specifies the length of the date field. Data format descriptions describes the length and format for each type of date field.
• Y2x specifies the Y2 format. Data format descriptions describes the length (m) and format (Y2x) for each type of date field.