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"On This Date in Cryptologic History" Calendar

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

March 2027

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S M T W T F S
Feb 28 Mar 1 2 3 4 5 6
1917: Zimmermann Telegram released to U.S. press.
1971: Cryptologic Pioneer Colonel Parker Hitt.
1832: Death of Jean-François Champollion.
1942: Station HYPO began reading Japanese system JN-25.
1924: William Friedman testifies re: Teapot Dome scandal.
1918: German ADFGVX cipher first used.
1971: Army RU-8 shot down, Vietnam.
1946: BRUSA Communications Intelligence Agreement
1930: First hire at SIS - Annie Louise Newkirk
1975: STONEHOUSE site officially closed.
1951: Shelby Patterson became chief of the AFSA school.
1971: Loss of Army UH-1 & its crew.
7 8 9 10 11 12 13
1973: 509th Radio Research Group was resubordinated.
1953: "Direct" SIGINT support to tactical air control center began on Cho Do Island.
1967: USAF EC-47 loss in Vietnam.
1876: First successful voice transmission over Bell's telephone.
1935: Navy cryptologic organization redesignated OP-20-G as Communications Security Group.
1951: AFSA Training Branch Established
1969: Death of Ralph J. Canine, first DIRNSA.
1918: Radio Intelligence Service, Mexican border, was established.
1942: Evacuation of Station CAST.
1954: USAFSS started Airborne Reconnaissance Program
14 15 16 17 18 19 20
1951: Seoul, South Korea, recaptured by UN forces.
1946: CREAM replaced ULTRA.
1974: Horst Feistel received a patent for "Block Cipher Cryptographic System."
1938: SIS started receiving messages from Purple.
1981: USAF RC-135 lost, Shemya.
2003: Operation Iraqi Freedom began.
21 22 23 24 25 26 27
1962: ASA flew first airborne radio direction finding mission in Vietnam.
1999: NATO began Operation ALLIED FORCE in Kosovo.
1999: Lt Gen Michael Hayden, USAF, became DIRNSA.
28 29 30 Mar 31 Apr 1 2 3
1994: Griffiss Air Force Base finds malware
Vietnam Veterans Day
1938: Chief Signal Officer Mauborgne permitted to perform intercept and cryptologic services for peacetime training.
1973: Last U.S. troops left Vietnam.
Monday, March 1, 2027
Tuesday, March 2, 2027
Thursday, March 4, 2027
Friday, March 5, 2027
Saturday, March 6, 2027
Sunday, March 7, 2027
Monday, March 8, 2027
Tuesday, March 9, 2027
Wednesday, March 10, 2027
Thursday, March 11, 2027
Friday, March 12, 2027
Sunday, March 14, 2027
Monday, March 15, 2027
Friday, March 19, 2027
Saturday, March 20, 2027
Monday, March 22, 2027
Wednesday, March 24, 2027
Friday, March 26, 2027
Sunday, March 28, 2027
Monday, March 29, 2027
Tuesday, March 30, 2027

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