Internationalization: Support for IANA time zones

Norbert Lindenberg ecmascript at
Sat Mar 2 11:08:40 PST 2013

On Mar 2, 2013, at 8:11 , Shawn Steele wrote:

> Re: UTC vs Tz names
> Sometimes UTC might be “enough”, or “almost enough”, but there’s a big difference between Pacific Time and UTC-8, because sometimes it might be UTC-7.  So just using UTC doesn’t really help formatting (people want something they’re familiar with), and it doesn’t really solve describing the TZ, because at a different time of the year that offset might be different.

Agreed, and if Microsoft or any other implementer wants to provide meaningful localized descriptions of all time zones in all languages, the spec certainly does not prevent that. The question was only whether the spec should describe a fallback to be used when an implementation doesn't have a meaningful localized description, and what that fallback should be.


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