Black Friday is considered to be the official start the Christmas shopping retail season. In the US it is one of the busiest retail days of the year. Its importance in Australia is growing as you can see here.
There is every indication that this year will exceed last year so almost all significant retailers Australia are doing something by offering the public some good specials and most will have extended trading hours to take advantage of the increased traffic on that day.
Also what we are seeing is the marketing groups are pushing their members for submissions for the day.
If you are part of Zip, you need to have your submissions in by this Friday, 9 November. One advantage of Zip as a marketing group is that its membership is free.
Note I would not worry about Cyber Monday, it is more for software companies like us in Australia, rather retailers.
If you have not done anything yet, I do suggest that you do give serious thought about doing something at least put a few signs up and put something on your receipts.