I hope you have a fun & memorable Hallowe'en night! Even the Scratch Cat decided to get dressed up :) The word Hallowe'en is a short form ('contraction') of "Hallows' Even" ("even" means eve in Scottish, I think). Hallowe'en is the evening before All Hallows' Day. Look up the history on the internet; it's interesting!
Thanks to bensound.com for the music (song "Creepy").