Hello @user1664 
Unfortunately, this functionality isn’t available in our widget yet! I am terribly sorry 
We have such a request in our Wishlist and our devs are working on it at the moment. We expect to release this option in a couple of weeks.
Please vote for this feature to get a notification upon its release - Turn off automatic Time zone calculation for each user of Event Calendar - #3 by ElfsightBot
If any questions come up, feel free to contact us.
Have a nice day 