Form Status: automatically enable form only in between a specific time frame.

I'm wondering how I can put a cut off time in for the submissions too so that people can only submit their order between 10:00am - 11:59am for example. 

Unfortunately, we do not have an automatic feature for what you need. You can only manually enable and disable the form: https://www.jotform.com/help/180-How-to-enable-disable-a-form 

I have forwarded a feature request to our back-end team, to have the option to enable the form in between a specific time-frame, so people can only submit it in the period of time. If there is any progress on this request, you will be notified via this thread.