One thing that bugs me when learning and explaining special relativity concepts is that the time axis on space-time charts always on the vertical axis. While almost everywhere else time is going on the horizontal axis.
Moreover space-time coordinates often written in the order of $(t, x, y, z)$. And in case of 1 dimensions $(t, x)$. Now when we speak of the event $(A, B)$, $A$ goes on the vertical axis $B$ on the horizontal and not vice versa as it usually goes on the coordinate charts.
So I always need to twist my mind a bit when working with it.
When did we started putting time on the vertical axis and what's the reason behind it?