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What happened on December 21? Here are 5 key events you should know

December 21 marks cosmic shifts, national milestones, and moments that changed global history

By Shaptadeep Saha

Dec 21, 2025 13:20 IST

Every day in the calendar holds its own place in history, and December 21 is no different. This date has seen events that range from groundbreaking achievements in space exploration and the arts to major political moments and acts of national change. Looking back at what happened on this day helps us appreciate how the past continues to shape our world today.

December 21 holds deep political, cultural, and emotional resonance across the world. The day has witnessed India’s territorial assertion to a tragedy that reshaped global aviation security, and has repeatedly emerged as a moment of endings and beginnings.

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The longest night

December 21 marks the Winter Solstice in the Northern Hemisphere. The day is characterised by the shortest day and longest night of the year. For centuries, this astronomical event has symbolised reflection, renewal, and the promise of longer days ahead.

First crossword puzzle was published

The world’s first crossword puzzle was published on December 21, 1913, in the Sunday edition of the New York World newspaper. Created by journalist Arthur Wynne, the puzzle was diamond-shaped and titled “Word-Cross,” marking the beginning of what would become one of the most popular newspaper features worldwide.

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Premiere of Snow White and the Seven Dwarfs

The premiere of “Snow White and the Seven Dwarfs” took place on December 21, 1937. It was the world’s first full-length cel-animated feature film. It arrived at a time when animation was considered a novelty. The film redefined cinematic storytelling and laid the foundation for modern animated cinema.

Goa’s liberation

December 21 is celebrated as Goa Liberation Day. In 1961, Indian armed forces successfully uprooted Portuguese colonial rule in Goa, Daman, and Diu. The operation marked a decisive moment in India’s post-independence history, asserting sovereignty and completing the nation’s territorial integration.

Pan Am Flight 103 exploded

On December 21, 1988, Pan Am Flight 103 exploded over Lockerbie, Scotland, killing 270 people. The bombing sent shockwaves across the world and led to sweeping changes in international aviation security, baggage screening, and counter-terrorism protocols.

December 21 stands at the crossroads of science, history, culture, and memory. It reminds us that while the night may be at its longest, change is always underway, whether in the skies above, the nations we live in, or the stories we tell.

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