Why Joda DateTimeFormatter cannot parse timezone names (‘z’)

I think that the reason is that ‘z’ timezone names are conventional (not standardized) and ambiguous; i.e. they mean different things depending on your country of origin. For example, “PST” can be “Pacific Standard Time” or “Pakistan Standard Time”.

If you are interested, this site has a listing of a large number of timezone names. It is not difficult to spot cases where there is ambiguity.

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