Is there a way to add timezone as one of the fields in the event settings for an event?

Most of our meetings are online web conferences and have attendees from all over the country(USA) remotely accessing via Webex. So we need an event time to also include a timezone.

Even if it could derive it from the event location param, that would be fine, as long as it's displayed wherever the time is displayed for events.

Please advise.

thanks!