Learn English – the meaning of ‘next days’

To me, “next Tuesday” means the Tuesday that comes next week. For example, on Monday, October 11 and Wednesday, October 13, “next Tuesday” means October 19. Whereas on Monday, October 18, “next Tuesday” means October 26. “This Tuesday” refers to the Tuesday that comes this week, which on Wednesday would refer to yesterday, and on Monday refers to tomorrow. Similarly, “Last Tuesday” is the Tuesday that came last week. Without any descriptors, day names by themselves mean the next such day in the future unless used in the past tense. “He will do it on Tuesday” means the next time there is a Tuesday, which on Monday would mean “tomorrow” but on Wednesday would mean the following Tuesday. In the past tense, day names mean the last such day which occurred. “He did it on Tuesday” means the most recent day that was a Tuesday.

Not everyone may agree with this analysis, but in my experience this is what most people mean when they use “this”, “last”, and “next” with day names.

There's a mishearing somewhere along the line. The expression is touch base.

The expression means to have [brief] contact with someone (to exchange news & views, or simply to remind each other that you still exist and have some kind of relationship). It derives from baseball, where the hitter has to actually touch each base as he runs round. The important thing there is that there must be contact with the base.

Baseball also gives us the expression touch all bases (more commonly, cover all bases), meaning to have a plan which covers all foreseeable eventualities. That metaphoric usage alludes to the fact that every base that's being passed must be touched.

Here's a brief summary of both usages