I have just searched for my listing via any weekend in May. It did not appear yet I am not booked for the weekend of the 20th / 21st May. Got onto Airbnb support.
I am told that because I am booked on the Friday night (the 19th) this classes as part of the weekend therefore my listing does not show up under weekends. So being free and available on the Saturday/Sunday nights I do not show up on weekend searches as I am booked Friday night.
So from Airbnb the weekend is Friday night, Saturday night and Sunday night.
Once again an Airbnb'ism. I work five days a week and have two days off. I do not work four days a week and have three days off.
Airbnb making the world their own once again.