EndDate: Placement end date. This date must be later than, or the same day as, the placement start date, but not later than the campaign end date. If, for example, you set 6/25/2015 as both the start and end dates, the effective placement date is just that day only, 6/25/2015. The hours, minutes, and seconds of the end date should not be set, as doing so will result in an error. This field is required on insertion.