November 28

Ferdinand Magellan's expedition completes the first passage through the strait bearing his name, entering the Pacific Ocean after 38 days.

After 38 grueling days navigating the treacherous strait later named in his honor, Ferdinand Magellan's fleet finally emerged into open water, which he named the Pacific Ocean for its apparent calm compared to the storms endured in the strait. The passage confirmed the existence of a sea route around South America, though Magellan himself would not survive to complete the full circumnavigation.

Panama declares independence from Spain and joins Gran Colombia, a date now commemorated as Panama's Independence Day.

Panama, along with much of Spanish Central America, declared independence from a weakened Spain and voluntarily joined the newly formed republic of Gran Colombia rather than pursue full separate sovereignty at the time. Panama would not become a fully independent nation in its own right until its later separation from Colombia in 1903, but this date remains celebrated as its Independence Day.

The United Kingdom and France formally recognize the Kingdom of Hawaii as an independent nation.

Britain and France's formal recognition of the Kingdom of Hawaii as an independent sovereign nation helped secure the island kingdom's international standing during a period of intensifying Western commercial and missionary interest in the Pacific. This recognition, however, would not prevent the kingdom's eventual overthrow and annexation by the United States later in the century.

Albania declares independence from the Ottoman Empire.

Albania declared independence from centuries of Ottoman rule amid the chaos of the First Balkan War, as Ottoman power rapidly collapsed across the region. The newly independent nation faced significant challenges establishing stable governance and defined borders amid competing regional interests from neighboring states in the years immediately following.

Franklin D. Roosevelt, Winston Churchill, and Joseph Stalin convene in Tehran to coordinate Allied strategy in World War II.

The Tehran Conference brought together the leaders of the United States, Britain, and the Soviet Union for the first time to coordinate strategy for the remainder of World War II, including plans for the upcoming Allied invasion of Nazi-occupied France. The conference also began early discussions regarding the postwar political reorganization of Europe.

Astronomers Jocelyn Bell Burnell and Antony Hewish detect the first pulsar in the constellation Vulpecula.

Graduate student Jocelyn Bell Burnell, working with her supervisor Antony Hewish, detected an unusual, extraordinarily regular radio signal that was initially nicknamed "LGM-1" for "little green men" before being identified as a previously unknown type of rapidly rotating neutron star, or pulsar. The discovery opened an entirely new field of astrophysical research into these extreme stellar objects.

East Timor declares independence from Portugal.

East Timor's declaration of independence from centuries of Portuguese colonial rule proved short-lived, as neighboring Indonesia invaded and annexed the territory just days later, beginning a brutal 24-year occupation. East Timor would not achieve lasting, internationally recognized independence until a UN-supervised referendum finally succeeded in the early 2000s.

Czechoslovakia's Communist Party announces it will relinquish its constitutional monopoly on political power.

Czechoslovakia's Communist Party formally agreed to abandon its constitutionally guaranteed monopoly on political power amid the rapidly escalating Velvet Revolution, a pivotal concession that paved the way for the country's first free multi-party elections in over four decades. The remarkably swift and peaceful transition became a model referenced by other post-Communist transitions across the region.

Margaret Thatcher formally resigns as British Prime Minister, succeeded by John Major.

Margaret Thatcher formally tendered her resignation as British Prime Minister to Queen Elizabeth II, concluding her eleven-year tenure and passing leadership to her chosen successor John Major. Her departure ended a transformative and often polarizing era in British politics defined by significant economic restructuring and privatization of state industries.

A charter plane crash near Medellin, Colombia kills 71 of 77 people aboard, including most of the Chapecoense football team.

A chartered aircraft carrying the Brazilian football club Chapecoense to a major South American cup final crashed into mountainous terrain near Medellin, Colombia after running out of fuel, killing 71 of the 77 people aboard including most of the team's players. The tragedy prompted an outpouring of international solidarity and tributes from football clubs and fans worldwide.