Norbert Lindenberg

ECMA-402 implementations are not required to, and in fact should not, follow the goofy rules for time zone handling in ECMA-262 edition 5.1: http://www.ecma-international.org/ecma-402/1.0/#ToLocalTime

Actually, the spec doesn't say "ASCII"; it says "alphanumeric", which in a Unicode context is not well-defined (are Thai digits OK because they're numeric, but Chinese letters prohibited because they're...

I see – there are actually two separate, incompatible specifications for the characters allowed in keys: – The one you reference, in the Future Compatibility section, which isn't entirely clear...