In SAS^® 9.4M0 (TS1M0) to SAS^® 9.4M6 (TS1M6), the default value for the YEARCUTOFF= system option is 1926. Beginning in SAS^® 9.4M7 (TS1M7), the default value for the YEARCUTOFF= system option is 1940. SAS releases prior to SAS 9.4M0 have a default value of 1920 for the YEARCUTOFF= system option.   

The YEARCUTOFF= system option is used when processing two-digit years to determine the century for SAS date values. The YEARCUTOFF= option specifies the first year of a 100-year span. For example, using the default value of YEARCUTOFF=1926, two-digit years of 26 through 99 are assigned a century prefix of "19" (for example, 1926–1999), and two-digit years from 00 through 25 are assigned a century prefix of "20" (for example, 2000–2025).

For detailed information about the YEARCUTOFF= system option, see SAS System Options: Reference. Further details about SAS date, time, and datetime values can be found in SAS Language Reference: Concepts.

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