Basically, when you mine dirt or grass blocks, the dirt block it drops will be named 'Earthy Dirt' on World Earth Day. If you place it and mine it again you still get the same name. If you place it and mine it not on World Earth Day, it reverts to normal dirt. It will have no special qualities, it is purely to commemorate World Earth Day. Also, the dirt in town will also be called that. I have some vague ideas for auctions. It should be auctioned in at least 1 DC, because it is extremely easy to obtain: just dig dirt. Also, it should be 100% Earthy Dirt, not a mixture of normal and special. I myself see no purpose for this, but I think dirt should be respected. Edit: 25% drop chance.