Watched History Addition: Unknown Date

When you select a movie to add to “Watched History” there are four options. There should be another option marked “Unknown” or something to that effect. Almost half my film watches would fall under that category.
Right now I am putting them all on January 1, 1950.

A similar feature could be added to “Collection.”

this has been suggested many times before: "Unknown" Play Date
Watched state without date info - #3 by Schtief