Hey felistia! So Review Days occur on the last weekend of every month - depending on your time zone they'll either start late Saturday or early Sunday, and they go for 24 hours. What happens is that there are three teams that all the participants are sorted into, and these three teams compete to get the most points, mainly by reviewing Green Room works, but really you can review anything! Hopefully this helps, but let me know if there's anything else you're unsure of.
