Annual observance

Morse Code Day

April 27 Cultural / community observance Updated 2026-07-08

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Overview

Morse Code Day, observed annually on April 27th, commemorates the birth of Samuel Morse in 1791, the co-developer of Morse code and a pioneer of the electric telegraph. This day honors his monumental contribution to long-distance communication, which revolutionized information exchange across continents and industries. While largely superseded by modern digital technologies, Morse code remains relevant in amateur radio, aviation (for navigational aid identification), and as a celebrated historical communication method, appreciated for its simplicity, efficiency, and profound impact on global connectivity.

Why it matters: Morse Code Day, celebrated on April 27th, honors the birth of Samuel Morse, whose invention of Morse code transformed long-distance communication and laid the groundwork for modern information exchange. This day serves as a reminder of the enduring legacy of Morse's innovations, which continue to influence various fields, from amateur radio to aviation.

Origin and story

The very first message sent via electric telegraph using Morse code was "What hath God wrought?", transmitted by Samuel Morse on May 24, 1844.

The international distress signal "SOS" (three dots, three dashes, three dots) is one of the most widely recognized Morse code sequences.

Quick facts

  • DateApril 27
  • TypeCultural / community observance
  • Great forFriends, Families, Classrooms, Teams

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Ways to celebrate

The first words ever sent over a telegraph line weren't Samuel Morse's own — they were suggested last-minute by a young woman who happened to be in the room, quoting a line from the Book of Numbers.

Learn a little code

Celebrate by:

  • Learning to tap out your own name or a short word in Morse code.
  • Sending a message to someone using only dots and dashes, and having them decode it.

See where it all started

Helpful resources:

Did you know?

Morse's original 1844 line ran just 38 miles, from Washington to Baltimore — within only a decade, over 23,000 miles of telegraph wire crisscrossed the country, reshaping how fast news and business could travel.

Fun facts

  • The very first message sent via electric telegraph using Morse code was "What hath God wrought?", transmitted by Samuel Morse on May 24, 1844.
  • The international distress signal "SOS" (three dots, three dashes, three dots) is one of the most widely recognized Morse code sequences.
  • While often associated with simple "dots and dashes," Samuel Morse's original American Morse Code was slightly different from the International Morse Code standardized for global use today.

Sources and attribution

How Samuel Morse Got His Big Idea (Smithsonian Magazine)

External links may lead to third-party websites.


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FAQ

When is Morse Code Day?
It is observed on April 27 each year.
What is Morse Code Day?
Morse Code Day, observed annually on April 27th, commemorates the birth of Samuel Morse in 1791, the co-developer of Morse code and a pioneer of the electric telegraph. This day honors his monumental contribution to long-distance communication, which revolutionized information exchange across continents and industries. While largely superseded by modern digital technologies, Morse code remains relevant in amateur radio, aviation (for navigational aid identification), and as a celebrated historical communication method, appreciated for its simplicity, efficiency, and profound impact on global connectivity.
How do people celebrate Morse Code Day?
Learn to tap out your name in Morse code, and send a dots-and-dashes message for someone else to decode.

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