NO PURCHASE NECESSARY TO ENTER OR WIN. A PURCHASE DOES NOT INCREASE YOUR CHANCES OF WINNING. VOID WHERE PROHIBITED. The Enter to Win A Carnival Cruise on Carnival Cruise Lines (the “Promotion”) begins at 9:00:00 AM Eastern Time (“ET”) on March 21, 2019 and ends at 11:59:59 PM ET on May 31, 2019 (the “Promotion Period”). The Promotion contains a game of chance (“Sweepstakes”). The computer clock of the Sponsor (defined below) is the official time-keeping device in the Promotion. Read the official contest rules here.