What is the most accepted time for a pre-tenure move? I am a second-year assistant professor who is hoping to make a pre-tenure move to a school/location that is better for my family. It is not a situation where my current department is bad or toxic, but I think my partner (job) and kids (schools, time with relatives) would be happier elsewhere.

I read a lot of advice which suggests that it is best to make a move before tenure rather than after. However, no one seems to specify when pre-tenure one should be looking. I am inclined to begin looking even before my mid-tenure review because the departments I would be looking in are typically small and I can't rely on the fact that they would have an opening in any particular year.

Is there a "normal," "accepted," or "typical" time to be make a pre-tenure move?

Here are some related questions:

What is a better point in an academic career to move to the U.S.: as an assistant professor or after tenure?

Job search when coming up for tenure
I think the answer is "when you find a good opportunity."  I have a slightly embarrassing amount of experience in this regard, as well as some experience on the other end of things viewing such applications.  My experience is that they will not care where you are in your tenure review process; the advice about moving pre- vs. post-tenure is mostly just because there are usually more internal barriers to hiring someone with tenure (which still happens quite often).