Hi @dkt,
We’d be happy to help — but I do want to note that our pre-sales forum is used to answer questions about purchasing our premium plugins.
If you’re looking for technical support, it would be awesome if you could post your question to our WordPress.org support forum. And, when you do, it would be super helpful if you could provide a link to your site and non-private system information when you post your question.
Or, if you already have an active license for one of premium plugins, will you please log into your account and post your topic to our premium support forum instead?
In the meantime, I would suggest checking your WordPress time settings on the Settings > General screen (screenshot) to make sure the time is correct there. Then, I would suggest following the steps in this guide to test whether there is a conflict between The Events Calendar and your theme or another installed plugin.
Thanks so much!
Geoff