Format request for toggling `timezone` awareness of `date-time`

[raj-open]

In some cases it makes sense work to further specific whether a date-time formatted string type in a definition contains timezone information. This is important in some programming languages, for instance python, which admit classes that contain or do not contain this information.

Would it be possible extend the choices from

format: date-time

to

format: date-time
format: date-time-zone
format: date-time-nozone

or something similar?

[ralfhandl]

date-time is always with time zone, date-time-local is always without time zone.

Does this cover your use cases?