This doesn’t make sense from a linguistics standpoint though. So next Thursday is the Thursday this week, but next week isn’t this week, it’s the week after this one. So what’s the Thursday in that week, the next next Thursday? It just doesn’t work.
Anything in this week (Sunday-Saturday or Monday-Sunday) even stuff from a few days ago -> this .
Anything from last week -> last
Anything in next week -> next
It’s incredibly simple and it’s logically consistent and it works in every situation unless you are talking to someone from a different country that uses a different starting day. And even then it works the majority of the time.