How to stop form submission based on time and appointment selection?

I'm creating a form to give employees shift start time options. I have it where they can select their current shift start time and then from an appointment picker they can select their new start time whether it's on the day of or a week in advance. Is there a widget or any conditional logic's I can add to prevent employees who are late from filling out my form? Thanks!

You can use Conditions to prevent submission using the Date Picker field in the form.

Please review the example on this similar discussion thread.

Using Conditional Logic with a DateTime field

For this to work on your form, you must add a Date picker field also.

Please let us know if you are not able to do this.