Limited-time Challenges

Daily Time Periods
 * 12:00 p.m. to 2:00 p.m. (PST)/1:00 p.m. to 3:00 p.m. (PDT)/8:00 p.m. to 10:00 p.m. (GMT)
 * 7:00 p.m. to 9:00 p.m. (PST)/8:00 p.m. to 10:00 p.m. (PDT)/3:00 p.m. to 5:00 p.m. (GMT)
 * 3:00 a.m. to 6:00 a.m. (PST)/4:00 a.m. to 6:00 a.m. (PDT)/11:00 a.m. to 1:00 p.m. (GMT)

These are repeatable, but only the first completion within the given time period awards a Copper A.M.A.N. Voucher.