Add "timezone" mdio "created" date

[blasscoc]

mdio data has a "create" field in it's "zattrs" file.

The propose feature would add time zone information to this datetime in some canonical way.

In a scenario where timezone information is unavailable; the meta data should record that it does not have that information; and not default to something like UTC.

[tasansal]

Good point. I think one clean way to standardize it would be to always save it as UTC and define it as a part of the standard to avoid time zone confusion. Then it's up to the client library to decide what to do with that information.

[blasscoc]

@tasansal thanks for the quick reply. Yes; since there likely isn't a large backlog of mdio data yet, having that requirement would save some trouble in the future.