Jim,
The only way to set the date, currently, is by configuring the FP-2000 to get the date and time from a Time Server on a Windows PC. See page 3-4 of the FP-2000/2010 User Manual.
I will submit a request for the ability to programmatically change the date as well as the time.
Regards,
Chad H.
Applications Engineering
National Instruments
http://www.ni.com/ask