This is a good link for October birthday ideas. Let's just say your birthday is in October and you want to have a fun party check out this link it gives ideas.
http://www.ehow.com/info_8262494_october-birthday-ideas.html. An Idea I think would be cute for an October birthday would be a Pirate themed Birthday Party. And the kids dress up as pirates,and they have a treasure hunt. And if it's for an adult my Advice is do a dinner themed party dressup.