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.
Please note that since "AM" is by default selected and the dropdown only have AM or PM option, it is not possible to verify that user has selected the dropdown.
One way to solve this issue is to enable 24 hours time format of date time field. Please check the screenshot below which should help you how to select 24 hours time format:
Hope this helps.
Do get back to us if you have any questions.