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"On This Date in History" Calendar

Learn about a wide variety of historical events related to cryptology, computers, math, cybersecurity, Intelligence, and more.

September 2020

This Month
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Month
Year
S M T W T F S
30 Aug 31 Sep 1 2 3 4 5
1939: Army's SIS Translates PURPLE
1918: Hudson Field Code
1968: "Star Trek: The Enterprise Incident"
1972: 11 Israeli Olympic athletes & German policeman killed.
1943: First Bombe to Nebraska Ave.
1945: Japanese Surrender Event
1983: KAL 007 Shot Down
1958: C-130 Shot Down
1997: National Vigilance Park Dedicated
6 7 8 9 10 11 12
1941: Winston Churchill Visited Bletchley Park
1983: Inventor Boris Hagelin Died.
1947: Grace Hopper & the First Computer "Bug"
1877: Frank Moorman (AEF Radio Intel) was born.
1940: Army & Navy Joint Exploitation of PURPLE
1918: U.S. Offensive on the Saint-Mihiel
2001: al-Qaeda Attacks in U.S.
1946: Elizebeth Friedman departs the U.S. Coast Guard.
13 14 15 16 17 18 19
1945: Signal Security Agency becomes ASA
1971: Cryptologic Pioneer Agnes Driscoll Died
1967: David Kahn's book, "The Codebreakers" was published.
1947: USAF Established
1956: First Civilian NSA Deputy Director Joseph Ream
1892: Birth of Philip Johnston - whose idea to use the Navajo language as a code during WWII would save countelss lives.
20 21 22 23 24 25 26
1983: Three Inventors Receive Patent for Encryption Algorithm RSA
1957: First NSA Open House
1980: Iran-Iraq War Began
1780: Treasonous Ciphered Letter
1891: American Cryptologic Pioneer William Friedman Born
1918: "Colorado" Field Code Issued
1918: Meuse-Argonne Offensive
1807: Alfred Vail, Telegraph Co-Inventor Born
1967: First Vice-Presidential Visit to NSA
1986: President Reagan Dedicated NSA Ops Bldgs
27 28 29 Sep 30 Oct 1 2 3
1940: Purple Analog #1 Started Decryption
1978: Fort Meade Protective Service
1924: Edward Hebern Received Patent
1953: Frank Moorman Died
Tuesday, September 1, 2020
Wednesday, September 2, 2020
Friday, September 4, 2020
Saturday, September 5, 2020
Sunday, September 6, 2020
Monday, September 7, 2020
Wednesday, September 9, 2020
Thursday, September 10, 2020
Friday, September 11, 2020
Saturday, September 12, 2020
Tuesday, September 15, 2020
Wednesday, September 16, 2020
Thursday, September 17, 2020
Friday, September 18, 2020
Saturday, September 19, 2020
Sunday, September 20, 2020
Monday, September 21, 2020
Tuesday, September 22, 2020
Wednesday, September 23, 2020
Thursday, September 24, 2020
Friday, September 25, 2020
Saturday, September 26, 2020
Sunday, September 27, 2020
Tuesday, September 29, 2020
Wednesday, September 30, 2020

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