Thinking it through, Greenman you are right. Having said that, though, I have known people who have worked with the Northern Hemisphere "schedule" as I mentioned. Paganism is a living, shifting religion, based more on inner wisdom, than external shoulds.
Kayne, you may need to make small adjustments to fit the rituals into our climate, seasons etc.
Ooh, and Jade I certainly didn't mean that they should be fitted into the Christian timetable (though goodness knows it happened in reverse!) rather that at certain times of the year there is an abundance of symbols, products, song, celebration etc that have adopted that go against our seasons eg halloween, Easter and Christmas. I think I was trying to be practical