You could use the ALLOW-DATE-TIME-OVERRIDE compiler configuration in conjunction with the RM_Y2K environment variable. See Chapter 10 of the RM/COBOL User's Guide for more information.
ALLOW-DATE-TIME-OVERRIDE. This keyword assists in testing for Year
2000 (Y2K) and other date/time problems by allowing parts of an application to
be tested without changing the actual date and time on the computer. An initial
date and time can be set prior to starting the RM/COBOL runtime system. The
value of ALLOW-DATE-TIME-OVERRIDE is set to YES, and the value of the
RM_Y2K environment variable is set with the desired date and time using the
following format:
RM_Y2K=YYYY,MM,DD,hh,mm,ss
Robert Heady
Liant Software Corp.