The term millennium language extensions (MLE) refers to the features of COBOL for Windows that the DATEPROC compiler option activates to help with logic problems that involve dates in the year 2000 and beyond.
When enabled, the extensions include:
There are several restrictions on use of the DATE FORMAT clause; for example, you cannot specify it for items that have USAGE NATIONAL. See the related references below for details.
The DATEPROC compiler option enables special date-oriented processing of identified date fields. The YEARWINDOW compiler option specifies the 100-year window (the century window) to use for interpreting two-digit windowed years.
related concepts
Principles and objectives of these extensions
related references
DATEPROC
YEARWINDOW
Restrictions on using date fields
(COBOL for Windows Language Reference)