Passing page data in hidden field

I am trying to pass data through a form via the hidden field of a form. My question is, can I grab the date from that specific event page that gets displayed and pass it through into my custom field. What would be the best approach to grab that data already on that page? Since we have multiple events I want a singular form with the ability to grab the data already created by that specific event and use a singular form to pass the date field listed on that event page.