Great post. Just wanted to advertise my request for a new system option, which would specify that when a two-digit year is encountered, an error should be generated rather than impute the century according to yearcutoff. For those of us who intend/expect that all of our data (and code) has four-digit years, this would allow us to confirm that this assumption is true. And we will know that we'll never be bit by Y2K issues again. https://communities.sas.com/t5/SASware-Ballot-Ideas/New-option-YearCutoff-ERROR-to-generate-error-when-encountering/idi-p/508496 .