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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.

November 2026

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S M T W T F S
Nov 1 2 3 4 5 6 7
1919 Britain's Government Code & Cypher School Established
1969: William Friedman died.
1952: NSA Established. LTG Ralph Canine, Director.
1918: The "Seneca" field code was released.
1942 COMINT Station Established on Guadalcanal
1944: Captain Joseph Wenger became head of OP-20-G.
1953: First NSA Newsletter
8 9 10 11 12 13 14
1989: Fall of Berlin wall began.
1918: Armistice signed ending WWI.
1917: AEF Radio Intelligence Section opened intercept site at Souilly, France.
1895: Ralph J. Canine, first DIRNSA was born.
1918: 1st Fixed U.S. Field Station in Houlton, ME.
15 16 17 18 19 20 21
1912: Herbert O. Yardley hired as State Department code clerk.
1989: Center for Cryptologic History was established.
1970: Attempt to rescue POWs from North Vietnam.
1969: First permanent ARPANET link established.
1921: W. Friedman appointed Chief Cryptanalyst for the Signal Corps
22 23 24 25 26 27 28
1941: Herbert Yardley fired by Canada's National Research Council.
1976: Data Encryption Standard Approved
1956: Lt Gen John A. Samford, USAF, became DIRNSA.
1986: Ronald Pelton, former NSA analyst, arrested for spying.
1957: Lt Gen Samford Officially Opened the NSA OPS1 Building
1960: VADM Laurence Frost, USN, became DIRNSA.
1616: Birth date of John Wallis
1866: First Encoded American Diplomatic Telegram
29 Nov 30 Dec 1 2 3 4 5
Sunday, November 1, 2026
Monday, November 2, 2026
Wednesday, November 4, 2026
Friday, November 6, 2026
Monday, November 9, 2026
Wednesday, November 11, 2026
Thursday, November 12, 2026
Monday, November 16, 2026
Tuesday, November 17, 2026
Friday, November 20, 2026
Saturday, November 21, 2026
Sunday, November 22, 2026
Monday, November 23, 2026
Tuesday, November 24, 2026
Wednesday, November 25, 2026

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