You can think of Prime Big Deal Days as fall's answer to Prime Day . While Prime Day is the bigger sale of the two, Prime Big Deal Days has grown substantially since its first iteration back in 2022. Do you need to be a Prime Member to shop during Prime Big Deal Days? Yes, you will need to be a Prime Member to shop the exclusive sales during Amazon's Prime Big Deal Days. Some tips for a successful Prime Big Deal DaysIf this will be your first October Prime Day, there are some basic things you need to know about Amazon sales: