Garnet is right! There are a couple of lovely Wheels for the Southern Hemisphere in the forum- although I’m afraid I can’t claim credit for them! @TheMuslimWitch and @Temujin_Calidius shared their Southern Wheels 
I did a bit of digging, and found two:
Here’s another great discussion about it as well:
It is a great question, @yolande1, and if I can put in my personal two cents about it, I would say that the Sabbats are inherently tied to the seasons- Sabbats mark key points in the cycle of the year and are festivals and celebrations that honor being present within the current season.
That being said, I’ve heard of some Southern witches who follow the Northern Wheel of the Year, and there are certainly witches who live in climates (such as close to the equator) where there aren’t four distinct seasons 
At the end of the day, I think each witch should celebrate and do what feels right to them and their unique practice 
However you choose to celebrate, wishing you a very blessed and happy time! Lots of love and blessed be 