What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
If you want your forms to be available only on certain time frame, then you may add a Time field and set current time as default, then you may add some conditions to show or hide the fields if the current time if the one you want the form to be available.
Then you should set the condition similar to this:
Here is also a guide that will help to show or hide fields based on other fields input: How-to-Show-or-Hide-Fields-Base-on-User-s-Answer
However, please provide us more details about what you're looking for, we will be glad to help.