Sunday, January 21, 2018: IDL / Where did the day go??

-
Today we crossed the International Date Line.  The International Date Line (IDL) is an imaginary line on Earth's surface defining the boundary between one day and the next. ... The International Date Line is located halfway around the world from the prime meridian (0° longitude) or about 180° east (or west) of Greenwich, London, UK, the reference point of time zones.

A person who goes around the world from east to west (the same direction as Magellan's voyage) would gain or set their clock back one hour for every 15° of longitude crossed, and would gain 24 hours for one circuit of the globe from east to west if they did not compensate by setting their clock forward one day when they crossed the IDL. In contrast, a west-to-east circumnavigation of the globe loses an hour for every 15° of longitude crossed but gains back a day when crossing the IDL. The IDL must therefore be observed in conjunction with the Earth's time zones: on crossing it in either direction, the calendar date is adjusted by one day.

Sunday was missed and it is suddenly Monday, January 22, 2018.  We had a short ceremony at the 7th deck pool area; I took about a 4-minute video, but so far our Internet has not been strong enough to input it to YouTube software so it could be put onto our blog.  Hopefully we will get to a port with Wifi strong enough to upload it.

We will arrive Tonga at 8 AM tomorrow, tour about eight hours, and head for Fiji.  The trip will require an over night plus a day at sea.

Comments

Post a Comment

Popular posts from this blog

Day 6 - Meteora, Greece

-
Image
  The  Meteora ,   pronounced   [meˈteora]  is a   rock formation   in the regional unit of   Trikala , in   Thessaly ,   Greece , hosting one of the largest and most precipitously built complexes of   Eastern Orthodox   monasteries , second in importance only to   Mount Athos .   The six (of an original twenty-four) monasteries are built on immense natural pillars and hill-like rounded boulders that dominate the local area. Between the 13th and 14th centuries, the twenty-four monasteries were established atop the rocks.   Meteora is located near the town of   Kalabaka   at the northwestern edge of the   Plain of Thessaly   near the   Pineios   river and   Pindus Mountains . Meteora was added to the  UNESCO   World Heritage List  in 1988 because of the outstanding architecture and beauty of the complex, in addition to its religious and artistic significance. The n...
Read more

Tolin's 2024 World Cruise blog posts, Day 75 Mar 24, 2024,Colono, Shri Lanka, Colombo City by Tuk-Tuk

-
Image
We docked overnight at Colombo Sri Lanka ,  historically known as  Ceylon  and officially the  Democratic Socialist Republic of Sri Lanka , is an  island country  in  South Asia . It lies in the  Indian Ocean , southwest of the  Bay of Bengal , separated from the  Indian peninsula  by the  Gulf of Mannar  and the  Palk Strait . It shares a  maritime border  with the  Maldives  in the southwest and  India  in the northwest. Sri Lanka has a population of approximately 22 million and is home to many cultures, languages and ethnicities. The  Sinhalese  people form the majority of the population, followed by the  Sri Lankan Tamils , who are the largest minority group and are concentrated in northern Sri Lanka; both groups have played an influential role in the island's history. Other long-established groups include the  Moors ,  Indian Tamils ,  Burghers ,  M...
Read more

Tolin's 2024 World Cruise blog posts, Day 39 Feb 17, 2024, Sydney, AU, Sydney Panorama

-
Image
  Sydney  is the capital city of the  state  of  New South Wales , and the most populous city in  Australia . Located on Australia's east coast, the metropolis surrounds  Sydney Harbor  and extends about 50 miles from the  Pacific Ocean  in the east to the  Blue Mountains  in the west, and about 50 miles from the  Ku-ring-gai Chase National Park  and the  Hawkesbury River  in the north and north-west, to the  Royal National Park  and  Macarthur  in the south and south-west. Greater Sydney consists of 658 suburbs, spread across 33 local government areas. Residents of the city are colloquially known as "Sydneysiders." The estimated population in June 2022 was 5,297,089; the city is home to approximately 66% of the  state's  population. The city's nicknames include the "Emerald City" and the "Harbor City." Aboriginal Australians  have inhabited the Greater ...
Read more