Daylight Saving

[ColinJDenman]

I think a simple format like the Unix TZ database entry
GMT0BST,M3.5.0/1,M10.5.0 // British Summer Time, starts last Sunday in March, ends in October
would be sufficient, then print a table of strings in the manual, or a drop-down list in settings. The code can be gleaned from bumerous implementations. It would certainly be more complicated to keep a graphical map, and also, in my experience, far more fiddly on a small screen. And for goodness sake keep the internal clock UTC, only make the TZ apply when displaying a date/time.

Let's not forget the Prime is essentially an under-specified smartphone with a nice(-ish: bad colours) keyboard. As such, my budget £30 Alcatel onetouch 903 does rather wizzy 3d graphing (Using free Arity app), though the 'keyboard' is painful.