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The islands that are only 3,8 km apart, but separated by 21 hours in time: The mystery of the Diomede Islands!

Written by Rafaela Fabris
Published 03/02/2025 às 00:51
The islands that are only 3,8 km apart, but separated by 21 hours in time: The mystery of the Diomede Islands!
The time zone doesn't catch the other island because the **International Date Line** runs right through the middle of the Diomede Islands, separating the US and Russian time zones. This makes Big Diomede (Russian) 21 hours ahead of Little Diomede (American), even though it's only 3,8 km away.

Two islands so close that you can even walk between them in winter, but separated by an absurd time difference: 21 hours! The Diomede Islands, in the Bering Strait, divide not only two countries – the USA and Russia – but also yesterday and tomorrow.

Have you ever thought about being in a place where, just a few kilometers away, it is literally another day? It sounds like something out of a science fiction movie, right? But this really happens in the Diomede Islands, one of the most bizarre and fascinating places in the world.

These islands are in the middle of the Bering Strait, and the whole thing is made even crazier because one of them belongs to the United States and the other to Russia. But the big detail? The International Date Line passes right through the middle of them, which means that Big Diomede is 21 hours ahead of Little Diomede.

In other words, if you go from one to the other, you are basically traveling through time – going to the future or going back to the past. Surreal, right? No wonder they have been nicknamed “Yesterday’s Island” and “Tomorrow’s Island”.

United States vs. Russia

But the time difference isn't the only thing separating these islands. In addition to time, they are also divided politically. Little Diomede is part of the United States, while Big Diomede belongs to Russia.

During the Cold War, this small stretch of sea became known as the “Ice Curtain.” This was because the Soviet Union used Greater Diomede as a strategic military base, and no one was allowed to get close to it. It was a real point of tension between the two world powers.

To this day, this separation is still evident. If an American wants to set foot on Big Diomede, he needs permission from Russia. And the same goes for a Russian who wants to go to Little Diomede. Even though it is so close, the barriers are enormous.

Life on the Islands

Living on any of these islands is not easy. The climate is incredibly cold, resources are scarce and life there is extremely isolated.

Little Diomede is still home to the Iñupiat, a native Alaskan people who have lived there for over four thousand years. They are masters of Arctic survival, hunting seals, walruses and even whales for food. Meanwhile, Big Diomede has no more permanent inhabitants – the Russians removed the population during the Cold War and turned the island into a military base.

Even with so many difficulties, the Iñupiat of Pequena Diomede remain steadfast, keeping their traditions and culture alive.

History of the Diomede Islands

The islands are named after Saint Diomedes, a Greek martyr. They were discovered by the Danish navigator Vitus Bering in 1728, on the day the Russian Orthodox Church celebrated the saint.

Then, in 1867, when the United States purchased Alaska from Russia, Little Diomede became part of American territory. Great Diomede, in turn, remained under Russian control.

In World War II and during the Cold War, the Great Diomede became a strategic location to the Russians, and the tension between the two sides on the island increased even further.

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Rafaela Fabris

He talks about innovation, renewable energy, oil and gas. With over 1.200 articles published in the CPG, he updates daily on opportunities in the Brazilian job market. Suggestions for topics: rafafabris11@gmail.com

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