Dec. 2, 2008
7:20 p.m.
At best, you could, for example, have a program that reads the source
files for the Olson database and picks the *last* start-of-DST and end- of-DST transition rules and constructs a POSIX time zone value from them. It might be possible to modify the zic program (the program that reads the source files and generates the binary files from them).
Recent-vintage time zone binary files end with either a line that's the POSIX time zone value (or a blank line if a POSIX value can't represent future transitions). --ado