When you first put an order on HOLD, no HOLD release date is required. There are many scenarios when the HOLD release date is not desired. Please consider adding that as a feature as there are many scenarios when people don't want a set release date. We've had clients numerous times have stuff get shipped because the order was originally on HOLD indefinitely and then when they edited it they accidentally didn't put it on HOLD for the right date or didn't see the HOLD UNTIL date and it was shipped before they wanted it to be shipped.