Screwy Time Period

Medieval knights using cellphones, 27th century people not using futuristic technology, you get the gist.

A Screwy Time Period is one in which it's very hard to pin down what time era a franchise takes place in. For example, a franchise could have no transportation such as cars, bikes, or even carts, but it could have power tools that the characters use. This is when Questioning Fiction becomes more legitimized as not even Rule 17 could justify a Screwy Time Period too well.