how can i limit form submissions per day?

I have created an event registration and would like to limit the registrations per day

Unfortunately, there is no built in functionality to limit submissions per day.

You can set form response limit for specific range of date an you can set this to a range of one day then on daily basis change the day to the next day.

There is no automatic way of achieving this.

https://www.jotform.com/help/137-How-to-Limit-Submissions-in-a-Form