Currently, there isn't a default setting for AM or PM, so the user must manually choose between them. One option could be for the auto-fill to set AM or PM by default. If the user enters the time but doesn't complete the AM/PM part, it won't autofill, but it will autofill if the time is incomplete and the user clicks away from the field. Another option to consider is adding it as an option in the formatPlaceholder.