Formidable Forms – Datepicker Options AddOn
Add more options to the date fields in your WordPress forms. This plugin gives you more options for forms with datepicker fields, so only the dates you want can be booked.
WordPress Datepicker Options Features
Blackout days of the week.
Blockout dates by selecting specific days.
Set the minimum and/or maximum date based on another date field for more control over the year range.
Set the minimum and/or maximum date base on the current date.
Show to datepicker inline so it shows directly in the form.