StarDestroyer.Net BBS

I'm reading through Bloodlines, and Traviss had a date in there. It was written with 4 numbers, not like our 3 (dd/mm/yy, or whatever order you want). Does anybody know why it has 4 numbers and not just 3?

Here it is, page 195:

Last inspected 6/8/1/36.

Lack of proper research. It is well established that the standard calendar is divided into days, months, and years.