The Format would not make orders after 12 noon be recorded for the next day.
It would just make it look like an order placed at 1 am on July 16th and 1pm on July 16th appear to have placed at the same time.
If it is recording an order made at 1pm on July 16th as being placed on the 17th, then it is the time sone used by the server, and not the format being used to store it.