How to change date that appears in sidebar

Hello – on my sidebar, I am including a calendar of future events. How can I stop the sidebar from pulling the date of publication, and instead make it include the date of the event?

https://capefearfamilymagazine.com/ This page shows the date of publication for the Polar Plunge.

https://capefearfamilymagazine.com/events/ This page shows the actual date. This is the date I want to show.

Thank you!