◆ On this day

April 21

4 sourced moments from April 21 in history: Why Rome's founding date is 21 April 753 BC (-753); Texas Won Independence at the Battle of San Jacinto (1836); The Seattle World's Fair opened, debuting the Space Needle (1962), plus 1 more.

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4 things happened on April 21

newest first ↓

1989 Technology · Computing & AI

Nintendo released the Game Boy handheld console in Japan

On April 21, 1989, a chunky gray brick with a green-tinged screen launched in Japan and quietly redefined portable play.

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1962 Geography · Landmarks & Wonders

The Seattle World's Fair opened, debuting the Space Needle

The Century 21 Exposition threw open its gates on April 21, 1962, unveiling a 605-foot tower built to imagine life in the new century.

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1836 History · War & Conflict

Texas Won Independence at the Battle of San Jacinto

In a fight that lasted barely eighteen minutes, a ragged Texan army shattered a Mexican force and birthed a republic.

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-753 History · Ancient

Why Rome's founding date is 21 April 753 BC

Rome's birthday was worked out seven centuries after the fact, partly from an astrologer's horoscope. Ancient writers disagreed on the year by up to 85 years.

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