message-format-wg
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Define time zone values and conversions
This is proposed as a separate change from #1077, as it was not discussed on the call.
The intent with the text updated here is to clarify what happens when the timeZone option is set on a date/time function.
The SHOULD/MAY language that's proposed is intended to allow for an implementation that does not support time zone conversions, which I believe matches the case in JS Temporal.
Is there prior art of local being used as a time zone value as we're proposing, or are there alternatives that other date/time formatters use?