@Danielx21: There are the tags 3, 4 and 5, for images...

Danielx21
2011-09-27T14:18:31-04:00

There are the tags 3, 4 and 5, for images having these single digits written somewhere. (notably, they serve virtually the same purpose as 2002, 2003, 2004, but the four-digit ones apparently always represent years)

Should the tags 0, 1, 2, 6, 7, 8 and 9 be used for the same purpose? I think they should.

They are all empty, except for 7, which is currently the name of a character. (And the tag 3 was an artist, in the past.)