event
Jack Dorsey
Jack Dorsey sent the first message on the social-media network Twitter.
Read on WikipediaOn this day in history
In 2026, March 21 falls on a Saturday. Here are 3 notable moments from the same calendar date.
This year (2026), March 21
falls on a Saturday
Last year it was
a Friday
Next year it will be
a Sunday
event
Jack Dorsey sent the first message on the social-media network Twitter.
Read on Wikipediaevent
The social media site Twitter (now officially named X) is founded.
Read on Wikipediaevent
Pope John Paul II makes his first ever pontifical visit to Israel.
Read on Wikipedia