So today is Wednesday, 27 October, and in four days' time, Sunday the 31st, is Halloween. That's not something that's so big here in New Zealand, but it is building and picking up momentum. I talk about Halloween because it's a time for people who think that it's fantasy and it's fiction, but it's very much based on a Celtic custom that dates back 2,000 years, Halloween being a holiday that's celebrated on 31 October. It's a time when there's a Celtic festival. People light bonfires and wear costumes to ward off ghosts and evil spirits. 