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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.

December 2021

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S M T W T F S
28 29 Nov 30 Dec 1 2 3 4
1887: U.S. Navy began using "The U.S. Navy Secret Code"
1932: Polish Cipher Bureau Success!
1950: ATLAS became operational.
5 6 7 8 9 10 11
1952: Pre-employment Polygraph at NSA.
Pearl Harbor Day - 80th Anniversary
1992: Premiere of William Gibson's "Agrippa"
1898: Official End of Spanish-American War
1941: Germany and Italy Declared War on the U.S.
1906: Birth of Grace Hopper - computer pioneer and U.S. Navy Rear Admiral
1815: Birth of Ms. Ada Lovelace, the world's first computer programmer
12 13 14 15 16 17 18
1977: Filing for RSA Patent
1562: Death of Johannes Trithemius
1972: NSOC Inaugurated
1993: National Cryptologic Museum Opened to the Public
1958: First NSA Holiday Party.
19 20 21 22 23 24 25
1801: Patterson's "Perfect Cipher" Letter sent to Thomas Jefferson
1881: First telephone ciphony device invented by James Harris Rodgers.
1988: Terrorist bombing of Pan Am flight over Scotland.
1961: SP4 James Davis - first American cryptologist killed in Vietnam.
1968: "Pueblo" crew released by North Korea.
1928: Friedman's Coded Holiday Gram
1946: Meredith Gardner broke into KGB message re: Manhattan Project.
2001: Shoe-bomber Richard Reid arrested.
20 Dec 1969: Anniversary of the Capture of North Vietnamese Notebooks
26 27 28 29 30 Dec 31 Jan 1
1948: Stone Board report on centralizing U.S. cryptologic organizations was issued.
1951: Brownell Committee established - led to creation of NSA.
Wednesday, December 1, 2021
Monday, December 6, 2021
Tuesday, December 7, 2021
Thursday, December 9, 2021
Friday, December 10, 2021
Saturday, December 11, 2021
Tuesday, December 14, 2021
Wednesday, December 15, 2021
Thursday, December 16, 2021
Friday, December 17, 2021
Sunday, December 19, 2021
Monday, December 20, 2021
Tuesday, December 21, 2021
Wednesday, December 22, 2021
Thursday, December 23, 2021
Friday, December 24, 2021
Monday, December 27, 2021
Tuesday, December 28, 2021

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