Time Travel Crossing the International Dateline While Navigating Rough Seas on the Carnival Luminosa

In Carnival Cruise Line’s 50 years of business it has only had two 30+ day sailings. Last year, in 2023 the Luminosa traveled from Seattle, Washington to Brisbane, Australia. This was Carnival’s very first historic long Journey cruise consisting of 30 nights. This year, we are on Carnival’s very first and longest 31 Night Cruise. The “Luminosa” is sailing from Brisbane, Australia to Seattle, Washington. We will be docking in three continents. Five ports in Japan, one stop in Guam, various ports and Fjord sailings in Alaska as well as crossing the Equator and the International Date Line. Today, on Monday, April 22nd, we crossed the International Date Line. The International Date Line (IDL) is an internationally accepted demarcation of the surface of Earth, running between the South and North Poles and serving as the boundary between one calendar day and the next. It passes through the Pacific Ocean, roughly following the 180.0° line of longitude and deviating to pass around some territories and island groups. Crossing the date line eastbound decreases the date by one day, while crossing the date line westbound increases the date. People traveling westward around the world must set their clocks: Back by one hour for every 15° of longitude crossed, and Forward by 24 hours upon crossing the International Date Line. People traveling eastward must set their clocks: Forward by one hour for every 15° of longitude crossed, and Back by 24 hours upon crossing the International Date Line. Failing to do this would make their time inaccurate to the local time.