Very soon we have All Hallows' Eve (in Danish: Allehelgensaften), or, as it is more universally known, Halloween. Another pagan festival turned into a christian celebration, Halloween was originally the celtic New Year, also known as Samhain, where the veil between the land of the living and the realm of the dead was lifted, and thus the malevolent spirits entering the physical world had to have the living daylights scared out of them, so they would return to whence they came, leaving us mortals alone for another year...
Scary masks, large bonfires, grinning laterns made from turnips and other vegetables, were the means to this grim end, and the traditions survived the christianization to the present day, where kids and other childish beings dress up and have parties among skulls, spiders, severed limbs, bats, and all kinds of gross decorations.
We are going to throw such a party for our kids in Argonor's Attic (what better suited location could we find?), and they can invite all the kids from their respective classes at school.
We already own quite a selection of Halloween decorations, and I've got myself a Dementor suit with rubber mask and hands, but I purchased some extra pieces at an almost local supermarket today:
A ghost and a pair of plastic skulls. They should come in handy.