I have two very basic vanilla installation of Drupal 8. One I have installed a few months back, and one I installed today.
I have an identical datetime range field in both of them. But I noticed that the older installation (8.8.4) saves the datetime after converting it to UTC format. However, the new installation (8.9.2) saves the date time as is entered in the form.
Is there a configuration or something which is controlling this? This is creating problem using the "Date all day" module I guess.