He always introduces it with the year, the month, the day, and the exact time, down to a hundredth of a second. Or he did for his first two appearances. (To quote: "Year, 1990. Friday, Febuary 23rd, 20 hundred hours, 51 minutes, 16.05 seconds, sir.") I dunno, maybe it changes later?

I figure I can stick with August 29th for a date and still be relatively close to his actual appearance in camp, but the year befuddles me.