[samatman]

This isn't almost universal, in fact it's generally understood not to be the case, some of the time.

If I say "next Wednesday" on Thursday, I mean the Wednesday of next week, not "this Wednesday" which was yesterday.

"Next Weekday" of a weekday that's yet to happen, means one week after that day within this week.

"Next Weekday" of a weekday that already happened, means the very next instance of that day in the calendar, "This Weekday" refers to the past.

"Hey, this Tuesday was your presentation right? How did it go?"

"We rescheduled for next Monday actually". <- this is obviously the Monday after the coming weekend.

[cercatrova]

You're right. I intuitively know and follow what you're saying, but I didn't put it into words correctly.