Just leave it out and let Org be single user, single time zone system. You can't make the impossible. It is not database for sensitive work.
Let it be text. If they want to convert to their time zone, let them do the home work. If they don't want to use Org for timestamps, like me, let them be. -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns In support of Richard M. Stallman https://stallmansupport.org/
