Here's just a couple of things that might help you do something in your quest to celebrate Goth Day in your own little way, be you a promoter or not.

We're hoping to add more ideas as we go along, especially for those of you outside the UK.

Unfortunately I don't have any names of companies outside the UK that produce promotional material or websites that offer the same, so please contact us if you want to recommend them to others on this site.

BADGES

A company that I've used before on several occasions for promotional badges. Good prices for small quantity runs. They provide a template for creating your badge

(our Goth Day Smiley+their template=cracking little Goth Day badge!)

GOTH DAY CAKES...

"What? Cakes?"

Yep. Why not? Get the kids involved in your Goth Day & knock up anything from cupcakes in purple food colouring & silver icing to chocolate skulls. Give them to your work colleaugues, your neighbours, whoever.

Use your imagination. I found these Halloween moulds on the net, and also these Mexican Sugar Skull moulds with just a little Googling.
(apparently they can be used for stuff other than chocolate, but I'm no chef...seriously-my cooking sucks.)