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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.

April 2020

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Month
Year
S M T W T F S
29 30 Mar 31 Apr 1 2 3 4
1930: Frank Rowlett Goes to Work for William Friedman
1872: Painter & inventor Samuel Morse died.
1907: Cryptologic pioneer Solomon Kullback was born.
1952: U.S. Navy's crypto org becomes Naval Security Group.
1973: Motorola completed the first handheld cellular phone call.
1981: Lt Gen Lincoln D. Faurer, USAF, became Director of NSA.
2001: Hainan Island incident involving Navy EP-3
2014: ADM Michael S. Rogers, USN, sworn in at NSA
5 6 7 8 9 10 11
1929: Sec of War created the Signal Corps - Signals Intelligence Service.
1917: U.S. entered World War I.
1882: Birth of Hermann Pokorny, founder of the Hungarian cryptanalytic service.
1950: Navy PB4Y-2 Privateer Patrol Bomber Shot Down.
1930: Abraham Sinkov reported to work at SIS.
1918: French Army Lt Georges Painvin solved the first key for the ADFGVX cipher.
1943: First break in the Japanese Water Transport Code.
1945: The "Yamato" sunk off Okinawa, largely due to SIGINT tipoffs.
2003: Baghdad fell to Coalition forces.
1964: IBM Introduced the System/360
12 13 14 15 16 17 18
2001: China Released 24 USN EP3 Crewmen.
1889: Herbert O. Yardley's birth date.
1969: "Der Spiegel" Reported on Computer Espionage
1942: Central Bureau Established
1993: Clinton administration proposed "Clipper Chip" method
1942: Station HYPO Intercepts Revealed Japanese Plans for Attack.
1943: Shootdown of Admiral Yamamoto.
1943: FRUPAC Intercepted Yamamoto's Encoded Itinerary.
1986: President Reagan Ordered Airstrikes Against Terrorists in Libya.
1969: Navy EC-121 Shot Down.
1961: Bay of Pigs Landing.
1967: NSA Experts Spoke in Public on Computer Security at Atlantic City Conference.
19 20 21 22 23 24 25
1862: Confederate Signal Corps Established.
1974: Louis Tordella Retired as D/DIRNSA
1930: Solomon Kullback Reported to SIS to work for William Friedman.
1869: Birthday of Cryptologic Machine Designer, Edward Hebern.
1980: Attempt to Rescue U.S. Hostages in Iran Failed.
1874: Radio Pioneer Guglielmo Marconi was Born.
1944: Gen MacArthur Attacked Hollandia, New Guinea
26 27 28 29 Apr 30 May 1 2
1791: Samuel Morse Was Born.
1985: SECAF approved women for duty on EC-130 aircraft.
1965: National Cryptologic School Approved
1964: DEFSMAC Established.
2007: Estonia Suffered Mass Cyber Attack.
Wednesday, April 1, 2020
Thursday, April 2, 2020
Friday, April 3, 2020
Sunday, April 5, 2020
Monday, April 6, 2020
Tuesday, April 7, 2020
Wednesday, April 8, 2020
Saturday, April 11, 2020
Sunday, April 12, 2020
Monday, April 13, 2020
Tuesday, April 14, 2020
Wednesday, April 15, 2020
Thursday, April 16, 2020
Friday, April 17, 2020
Saturday, April 18, 2020
Sunday, April 19, 2020
Tuesday, April 21, 2020
Wednesday, April 22, 2020
Thursday, April 23, 2020
Friday, April 24, 2020
Saturday, April 25, 2020
Monday, April 27, 2020
Wednesday, April 29, 2020
Thursday, April 30, 2020

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