Some may find it odd that such is not a required field for internet email. Given only what's in your post and what's required for an (internet) email, nothing is wrong here.
When sending or receiving email, outlook express 6 posts no day, date, or year. I am using Windows 2000 pro. all the latest updates. Here is an example of the problem.
DDDD, July DD, YYYY 11:10 PM. The system time and date are set properly.