Hi Lora,
Thanks for using our plugins.
We do not have a feature to display the timezone for the event.
You maybe to do it through a customization of the theme following our themer’s guide:
https://theeventscalendar.com/knowledgebase/themers-guide/
And then you could put a custom field in the event editor of the admin to enable a timezone to be selected.
Also, If you would like to request that feature please head to our UserVoice Page and add your own or upvote that feature as they will increase the chances of it being added to a future version.
http://tribe.uservoice.com/forums/195723-feature-ideas
Cheers