Never said that... I'm saying getting it approx. right is good enough to provide a default selection in the select box if nothing is selected to begin with...
If 'getting it approximately right' is acceptable, why bother with timezones anywhere and simply just use time offset?
But that's how SMF does it, isn't it...?
(I could just ignore the server time, force it set to UTC, not have a server time offset and just simply have everyone set their own time offset from that, but that would be unpleasant)
Yeah... DST breaks a lot of things, not only in the computer world. Sigh.
Oh, I didn't look at the actual options in a phpBB website registration, but the presentation is still very much the same thing. (And DST is why time offset is fundamentally broken.)