Cumberland County, PA recently issued the following announcement.
Civilian Absentee Ballot Deadline
Friday, May 11, 2018
Voted Absentee Ballots must be delivered by mail or in person by the voter him/herself by 5:00pm on this date to be accepted.
May 11, 2018
Civilian Absentee Ballots are due by 5:00pm on 5/11/18 for the May 15th General Primary. Postmarks are NOT accepted.
Original source: https://www.ccpa.net/Calendar.aspx?EID=4198&month=5&year=2018&day=11&calType=0