p_k on "[Plugin: Contact Form 7] Start date and end date validation"

I would like to have two date field in my Wordpress contact form 7. A start-date and an end-date. The fields will be datepickers from the "Contact Form 7 plugin. When visitor has selected a start-date he should only be able to select an end date that is next dat later then the start-date.

How can I achieve this by only using the "contact form 7" form creator?

https://wordpress.org/plugins/contact-form-7/