> 
>> In addition I feel that the 
>> ICU and Sun classes do not accurately reflect Zoneinfo structures.
> 
> Well, ICU (and Sun/Oracle) have to gather daylight saving amount (usually 
> 1 hour, but some exceptions) information because Calendar API expose it. 
> However, zic does not preserve the daylight saving amount information in 
> the output files. Other than daylight saving amount information, ICU (and 
> Sun/Oracle JDK, if my understanding is correct) duplicate the structure 
> logically. ICU also adds some extra aliases for backward compatibility 
> support purpose.
Interesting. My approach is to hydrate the Zoneinfo files into Java objects and then process rules as required.

> 
>> 
>> I shall open-source this project once it gets to a working point.
>> 
>> It'd be terribly helpful if I could get hold of some test cases, 
> automated 
>> or otherwise, that verify correct time zone calculations. Would anyone 
>> out there have such things?
>> 
> 
> In ICU project, we use slightly modified version of zdump and compare the 
> output with the one generated by ICU's TimeZone implementation. You may 
> consider similar method for testing your implementation.
That's a good idea. Thanks.

Kind regards,
Christopher