I cannot see any date of program in the user interface.
The "Current version of virus database" shows the version and the compilation date of the virus database. The other items (Date of last scan, Virus recovery database) may show other dates related to the operations on your system, but the program compilation date simply isn't there... (only in the About box, there is Apr2004).
The "version" of the program is simply given by the build number, no date.