Yeah, I think that gets at the fact that it's typically "obvious" what you mean in context - which is part of why I think the TZ database names can feel so off. Why in the world do you need that much precision?!

(We of course, both know why! And if you haven't seen the names before but you're a programmer, youprobably still make some assumptions about edge cases, precision, etc. But I'm assuming that is not the experience of the typical Google Calendar user?)