Good evening and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with this topic.
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
There are typically two levels at which you can set the time format:
- Under /wp-admin/options-general.php
- Under Events -> Settings -> Display
Tweak those to your liking 🙂
Let me know how that goes.
Best regards,
Geoff B.