Cryptologic Dates in History Calendar

"On This Date in History" Calendar

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

December 2023

This Month

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26	27	28	29	Nov 30	Dec 1	2
					1887: U.S. Navy began using "The U.S. Navy Secret Code"
					1932: Polish Cipher Bureau Success!
					1950: ATLAS became operational.

3	4	5	6	7	8	9
			1952: Pre-employment Polygraph at NSA.	Pearl Harbor Day		1992: Premiere of William Gibson's "Agrippa"
						1906: Birth of Grace Hopper - computer pioneer and U.S. Navy Rear Admiral

10	11	12	13	14	15	16
1898: Official End of Spanish-American War	1941: Germany and Italy Declared War on the U.S.			1977: Filing for RSA Patent	1562: Death of Johannes Trithemius	1972: NSOC Inaugurated
1815: Birth of Ms. Ada Lovelace, the world's first computer programmer				1958: First NSA Holiday Party.

17	18	19	20	21	22	23
1993: National Cryptologic Museum Opened to the Public		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.
Anniversary of NCM Opening to Public			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

24	25	26	27	28	29	30
1928: Friedman's Coded Holiday Gram			1948: Stone Board report on centralizing U.S. cryptologic organizations was issued.	1951: Brownell Committee established - led to creation of NSA.

Dec 31	Jan 1	2	3	4	5	6

1952: Pre-employment Polygraph at NSA.

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Pearl Harbor Day

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1941: Germany and Italy Declared War on the U.S.

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1562: Death of Johannes Trithemius

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1972: NSOC Inaugurated

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1801: Patterson's "Perfect Cipher" Letter sent to Thomas Jefferson

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1988: Terrorist bombing of Pan Am flight over Scotland.

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1968: "Pueblo" crew released by North Korea.

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1928: Friedman's Coded Holiday Gram

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1948: Stone Board report on centralizing U.S. cryptologic organizations was issued.

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1951: Brownell Committee established - led to creation of NSA.

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