[tz] Dealing with Pre-1970 Data

[Zefram]

Lester Caine wrote:
>                                         but you have already made
>assumptions in that script which is the point here.
>Silly little things like is 7.5 degrees included in the first or
>second zone of a simple grid.

That's not local mean time, as we understand it.  If you want the strict
hour-interval time zones (which is what gives you 7.5 degree edge cases),
round the LMT offset to the nearest hour.

-zefram