New Last Call: 'Tags for Identifying Languages' to BCP

Joe Abley jabley at
Tue Dec 14 02:50:51 CET 2004

On 13 Dec 2004, at 18:34, Peter Constable wrote:

> 3. Re ISO 8601 time/date format: What is used in the registry is dates 
> expressed in the format "YYYY-MM-DD". It was agreed that it would be 
> better to identify the format precisely rather than make the generic 
> reference to ISO 8601.

Why not require dates to be formatted as per RFC 3339?

In general, "YYYY-MM-DD" is ambiguous unless a timezone is specified.


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