Organizing Leads for each year

Organizing Leads for each year

I am trying to organize my leads for each year. Some leads were a great opportunity for 2019 but I need to classify them now for 2020 to see the new status. I am only using the accounts for current clients so we do not use the accounts section. I dont want anyone accidentally calling a current client and that is the reason for moving them to accounts. so for leads what is the best method to see the status each year or classify them so that we dont have to go back through each one at the start of each year?