Time Zone for an event content type cannot be arbitrarily set

Can someone verify that it is not possible to arbitrarily set an event content type's time zone?

I found that when I create an event in Plone 6 Classic UI, the event will use the user's preferred time zone setting if present, else the site's default time zone, and that there is no way to enter an arbitrary time zone for an event. This is bad for online events that have no physical location, and participants may be located in different time zones.

See Cannot set events with a user preferred time zone · Issue #5324 · plone/volto · GitHub for details.