Many people believe that a dream is the brain’s way of working through unfinished business and present day issues. The unfinished business could be from the past and this could be why individuals have dreams about yesterday. It is a way to finding solutions to an earlier concern, or an indication to prepare for the future through the unconsciousness.
A dream about yesterday might represent places from your past and item you experienced in your childhood that make you innocent and happy which makes you want to relive them over and over again; or indicates a desire for something that can’t be fulfilled in actual life.