date back(redirected from dates back to them)
To have originated at an earlier time. This phrase is often followed by "to" and then the corresponding time frame or historical figure. I know she thinks that this vase is some great antique, but I doubt it dates back more than 30 years. This vase dates back to the Victorian period. This vase dates back to Queen Victoria.
date back (to someone or some time)
to have origins that extend back to the time of someone or something. This part of the palace dates back to Catherine the Great. This is old! It really must date back.