As noted in the previous post, it's frustrating. But every once in a while, there are hints. For example, on the back of the second of the Gun Law strips is an advertisement for an auction to be held April 28, 1964 -- so my guess is that the story begins at some point in April 1964.

In the case of the Flook strips I'm about to post, the one that begins with Rufus saying, "Come out," is dated August 5, 1955. But that's because someone wrote the date at the top of the strip -- not because there's printed indication on the strip or its other side.