Cryptologic Dates in History Calendar

"On This Date in Cryptologic History" Calendar

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

August 2025

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27	28	29	30	Jul 31	Aug 1	2
					1972: Lt. Gen Sam Phillips Becomes DIRNSA....	1943: Australian Coastwatchers Send Code
					1969: VADM Noel Gayler becomes DIRNSA	1990: Iraq Invaded Kuwait
					1958: Dr. Louis Tordella became D/DIRNSA
					1920: Brigadier John H. Tiltman Joined GC & CS

3	4	5	6	7	8	9
1918: "Mohawk" Field Code was issued.	1955: Prototype U-2 Flight	1963: Limited Nuclear Test Ban Treaty	1945: US Dropped Atomic Bomb Over Hiroshima	1944: "The Harvard Mark 1"	1975: Lt Gen Lew Allen Testifies	1945: Nagasaki
1987: Death of Joseph Desch - innovative engineer for the National Cash Register Company		1925: Radio Orphan Annie Secret Society		1958: Herbert O. Yardley Died	2008: Georgia-Russia Cyber Attacks
		1994: Solomon Kullback Died

10	11	12	13	14	15	16
	1972: Last U.S. Ground Combat Unit Leaves Vietnam	1918: "Allegheny" Field Code was issued.	1961: Berlin Wall Contstruction Began	1944: Spy Velvalee Dickinson Sentenced	1945: Japan Announced Surrender	1858: Early Telegraph Communications
	1942: Hedy Markey (Lamarr) Receives Patent	1981: IBM PC Debut		1982: Navajo Code Talkers Day Declared

17	18	19	20	21	22	23
			1968: Soviet Invasion	1846: Étienne Bazeries Birth Date	1956: U.S. Navy Recon Plane Shot Down
					1907: Abraham Sinkov was born.

24	25	26	27	28	29	30
	1948: Stone Board Has First Meeting	1914: Russian Navy Seized Codebooks	1878: Colonel Parker Hitt's Birth Date		1949: Soviets Detonate Atomic Bomb
	1778: Beginnings of Culper Spy Ring with GEN Washington & MAJ Tallmadge	Poland and Britain signed the Agreement of Mutual Assistance.
		1892: Elizebeth Smith Friedman Birth Date

Aug 31	Sep 1	2	3	4	5	6
1914: German Intercepts of Russian Radio Traffic

1955: Prototype U-2 Flight

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1945: US Dropped Atomic Bomb Over Hiroshima

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1945: Nagasaki

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1961: Berlin Wall Contstruction Began

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1945: Japan Announced Surrender

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1858: Early Telegraph Communications

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1968: Soviet Invasion

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1846: Étienne Bazeries Birth Date

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1878: Colonel Parker Hitt's Birth Date

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1949: Soviets Detonate Atomic Bomb

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1914: German Intercepts of Russian Radio Traffic

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