Event System

Hello, I need a very simple event layout. The one thing I can't see for an option is marking the events as "Past Events" or moving them to a separate category or some other way (it doesn't matter what this is) to separate them in the category list. Unless the booking system has a method, I think I need some custom solution to do this.

Please don't just say nothing is possible. I have to have some solution. It can be something I don't know, have not thought of, or possibly some simple code to make something happen.
Thank you

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