This variable implements "date windowing" for Acu4GL. It determines the two-digit years considered to be in the twentieth century and the two-digit years considered to be in the twenty-first century.
This variable accepts a two-digit value. Two-digit years that are smaller than this value are considered part of the twenty-first century ("2000" is added to these dates).
Two-digit years that are equal to or larger than this value are considered to be in the twentieth century ("1900" is added to them).
The default value for 4GL_2000_CUTOFF is 20.