I have not put this all together.
First take a look at these examples I’ve created. Basically it’s a group of examples that show how to get and set values of ACF fields using JavaScript https://github.com/Hube2/acf-dynamic-ajax-select-example
Next, take a look at this topic about getting the value of a datepicker field http://stackoverflow.com/questions/8147108/getting-value-from-jquery-datepicker
And finally take a look at this topic on setting the value of a datepicker field http://stackoverflow.com/questions/606463/jquery-datepicker-set-selected-date-on-the-fly
Not sure if this will get you where you need to go. You may want to look for more information on getting and setting datepicker fields, I just picked the first 1 that came up in a search.
EDIT: I’d love to see any solution you come up with. If I had a couple of hours to kill I’d create a new example for this.
