Learn English – I learned about ‘enough that~’ sentence structure like:

We tend not to speak of having known someone unless there’s a fixed period of time, either explicitly mentioned or implied by the situation (e.g. the person is deceased).

With that in mind, I would switch your two usages to describe the other scenarios, with slight alteration:

It was the first time that I’d seen her since I was in elementary school. A couple of days ago, when I saw her, she acted as if she hadn’t known me (for eight years when we were kids). I think she didn't remember me.

In this case, there’s a specific timeframe in which knowing occurred, which has since ended.

I broke up with her a couple of weeks ago, and we saw each other yesterday. At that time, she acted as if she didn’t know me. She definitely knew who I was, but pretended as if she didn’t know me because she didn't want to talk to me.

This is the common use of the phrase. We think we either know someone or we don’t. It’s like a light switch. She acted like the light was off; she acted like she didn’t know you.

Another common way English speakers would discuss something like this is to say “she acted like we hadn’t met” or “she acted like we’d never met”. These use “met” in the sense that you meet someone and from that point forward you know that person.

Unless it's absolutely imperative that they know your every available hour, I would just trim it up a bit:

Call me anytime in the next two weeks after 1pm Tokyo time, except Tuesday or Friday.

It's not as accurate but it's simple and probably gives them more than enough options on when to call you. If you really need them to understand the full extent of your availability (perhaps because it is very important that you be available to be called at all times) then I really would consider a bulleted list:

Here's my availability for the next two weeks:

• This Friday after 3pm.
• Prior to 5pm next Tuesday.
• Any other day after 1pm.

If I was speaking this to them on the phone, it would sound a lot like me reading that quote as-is.

You could also write it as a sentence:

Here's my availability for the next two weeks: this Friday after 3pm; prior to 5pm next Tuesday; any other day after 1pm.

Could also use commas instead of semicolons but I believe it's appropriate to use semicolons as a sort of "super comma" when the things you are separating are complex. This is probably what you are looking for, in fact. The semicolon is basically the bullet point of a single sentence. See: here (funny comic about semicolons).