Stumbled upon this report after a couple of hours struggling, can confirm the same issue with WP 6.01 / ACF 5.12.3
I’m using ACF with a calendar PHP script and I need to use date_default_timezone_set(‘Europe/Rome’);
in one of my functions.
This results literally in a datepicker value that, when retrieved from that function get_field (‘my_date’, $post_id); //format Y-m-d
// * * * output: 2022-07-06`
while if edited in the original post field or even in the database record is: // * * * output: 2022-07-07