Event Brief
Mar 21, 2026 at 5:02 PM ET
20 Years Since the First Tweet by Jack Dorsey
By The BriefBrief
March 21 marks two decades since Jack Dorsey posted the first tweet, changing social media forever.
WHO: Jack Dorsey
WHAT: Posted the first tweet
WHEN: Mar 21, 2026 at 4:30 PM ET
WHERE: USA
WHY: To commemorate the anniversary of the first tweet.
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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