Or Halloween, or Samhain, whichever you'd like to call it. I like All Hallows Eve, it sounds a bit fancier than Halloween but not as pretentious as Samhain.
Anyway, today is the end of the pagan year, as the months move into Winter and things start withering and dying. All I can say is thank fuck the year's ended because so far this year has been pretty bloody awful. Roll on the new one.
Halloween has it's spooky reputation as it's meant to be the night when the dead walk the earth as ghosts - this is because pagans believed that Samhain marked a boundary between one year and the next, and that where boundaries exist the veils between the worlds are thin, making it easier for ghosts and other mythological beings to come through. We use pumpkins at this time because a) they are in season, and b) they were sacred to the druids.
Whatever you believe, whatever you celebrate, have a great day!