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   April 18
1756:
Jacques Cassini, discoverer of the
Cassini Division between the A and B rings of Saturn, died. 1775:
Paul Revere
began his famous ride from Charlestown to Lexington, MA, warning American colonists
that the British were coming. 1838:
Lecoq de Boisbaudran, discoverer of gallium, was born. 1906: San
Francisco was hit by a disastrous
earthquake. 1907: Denmark became the first country to use fingerprinting
to identify criminals. 1923:
Yankee
Stadium opened. 1925:
World Amateur Radio Day (WARD) established to commemorate the
founding of the International Amateur Radio Union (IARU). The first U.S. commercial transcontinental
radio transmission of a radio facsimile was sent from San Francisco to New York
City. 1942: An air squadron from the USS Hornet led by Lt. Col.
James H. Doolittle
raided Tokyo and other Japanese cities. 1943:
Admiral
Yamamoto of the Imperial Japanese Navy and mastermind of the Pearl Harbor massacre,
was shot down during Operation Vengeance, crippling morale for Axis forces. 1945:
Sir John
Ambrose Fleming, inventor of the diode tube (Fleming
valve), died. 1955: Nobel laureate
Albert Einstein, died. 1989: Thousands of
Chinese students demanding democracy tried to storm Communist
Party headquarters in Beijing.
| Jan
| Feb | Mar |
Apr | May |
Jun | Jul |
Aug | Sep |
Oct | Nov |
Dec |
Note: These
historical tidbits have been collected from various sources, mostly on the Internet.
As detailed in
this article, there
is a lot of wrong information that is repeated hundreds of times because most websites
do not validate with authoritative sources. On RF Cafe, events with
hyperlinks have been verified. Many years ago,
I began commemorating the birthdays of notable people and events with
special RF Cafe logos.
Where available, I like to use images from postage stamps from the country where
the person or event occurred. Images used in the logos are often from open source
websites like Wikipedia, and are specifically credited with a hyperlink back to
the source where possible.
Fair Use laws permit
small samples of copyrighted content.
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