Integrating with flatpickr
The form below is an example of using the date validator with flatpickr, a lightweight and powerful datetime picker.
TipYou should look at the basic principle when integrating FormValidation with 3rd party libraries
If you look at the sample code in the Code tab, the date field has to be revalidated after picking a date from the date picker. You have to do the same thing for any date picker.
The following validators might be useful to you.