Grooming Day is a Cats Rule holiday that is explained in the video above.
Make your own version of this video:
First, download the 148 MB .zip file needed
Next, click on “(MakeYourOwn) GroomingDay2020.zip” and click “Extract All”. Depending on how you’ve configured your computer, you may need to either left or right-click to find “Extract All”.
Then, after you’ve opened the folder “(MakeYourOwn) GroomingDay2020”, click on ReadThis.txt and that text file will tell you everything else you need to know.