Draft response to I18n

Thank you for pointing this out.

We are thinking of writing a note that we are supplying syntax for only the
purpose of the element. Authors should be aware that the default formats
are specified in language date and time specifications [XXXX]. When using a
format that is not the default, authors should ensure it is specified. For
example, by using [XXX].  (Where XXX refers to the relevant different Lang,
Date and time semantics and specifications for different locations , and
XXX is the default specifications.)

Does that sound like a reasonable approach? Could we ask for guidance on
what specifications we should reference?

We would also appreciate a joint call so that we we are handling  this
correctly.

With thanks
The task force