A reference for special emphasis on dates or times, or anything in general. Much more than just 20-aught-04 for the year 2004, you use "aught" for anything that you need special attention for. Mostly when remembering something.
1. Dude, remember that car that talked, that "aught" Knight Rider show, well, its back and horrible as evah.
2. What was that name of that hmmmmm, "aught" chick again?