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.
Unfortunately, you cannot achieve this using any of the Payment tools.
The workaround that can work is to create Custom Payment Form that will have payment options base on Dates.
Use the Smart Forms Using Condition Logic and
Here is my demo jotform you can try https://secure.jotformpro.com/form/51386110016948
The Date field in the form is visible for demo purpose only. I set the condition that if date is greater than 5-30-2015, the new price will change.
You can clone my demo form if you like to see how I made it.
user guide: -How-to-Clone-an-Existing-Form-from-a-URL
Hope this help. Let us know if you have further inquiry.