[Oni]

/s

The point of the analogy is that, on calenders of even in speech, we in the Southern Hemisphere never use 'Fall'. It's not a British thing.

Thus, it fits in with your "must be a southern hemisphere thing". Using the Summer and Winter thing is pretty much saying everything is the opposite. Ninety-One Point Eight isn't the opposite to Nine One Eight, it's a different way of saying it, like Fall and Autumn.

Why do I bother? Just call me an ♫♫♫ and move on.