I am not sure where you are seeing that info. From the site that Rafeeq and Aravind listed the AntiVirus defs date is 2/1/2010 Here is the info from that site from the time of this post.
Multiple Daily Updates
- Symantec Endpoint Protection 11
- Norton AntiVirus 2008 and newer
Virus Definitions created 2/1/2010
Virus Definitions released 2/1/2010
Defs Version: 120201av
Sequence Number: 106601
Extended Version: 2/1/2010 rev. 48
Total Detections (Threats & Risks): 6293701