1266290 - Intl.DateTimeFormat should allow IANA timezone names to be used

Status: RESOLVED FIXED

(Core :: JavaScript: Internationalization API, defect)

Description

[Daniel Lo Nigro (daniel15)]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.75 Safari/537.36

Steps to reproduce:

In the original Intl spec (ECMA-402) which is currently implemented in Firefox, supporting timezones other than UTC was optional. However, in the latest versions of the spec (both the released 2.0 and the draft 4.0), it is mandatory to accept IANA timezone names.

References:
Old spec, 12.1.1.1 InitializeDateTimeFormat, step 16c: http://www.ecma-international.org/ecma-402/1.0/#sec-12.1.1.1
New spec, 12.1.1 InitializeDateTimeFormat, steps 19c and 19d: http://www.ecma-international.org/ecma-402/2.0/#sec-InitializeDateTimeFormat

To reproduce, execute this in the console:
new Intl.DateTimeFormat('en-US', {timeZone: 'Australia/Sydney', timeZoneName: 'long'}).format()


Actual results:

Error thrown: RangeError: invalid time zone in DateTimeFormat(): AUSTRALIA/SYDNEY


Expected results:

Return a string similar to "4/21/2016, Australian Eastern Standard Time"

Comment 1

[Alexandre Folle de Menezes]

Firefox is losing points in http://kangax.github.io/compat-table/esintl/ because of this.

Comment 2

[André Bargull [:anba]]

Fixed in bug 837961 (https://hg.mozilla.org/mozilla-central/rev/f7823287275f).