March 19 marks the centennial of the Standard Time Act, which officially set-up
the time zones for the United States. Previously, five North American time zones
had been established by the American and Canadian railroads at precisely
12:00 Noon on 1883 November 18, upon a time signal sent over the telegraph
from the Allegheny Observatory in Pittsburgh. The Standard Time Act of 1918
also established America's first Daylight Saving Time to conserve energy during
World War I, after being promoted by Pittsburgh business and civic leader
Robert Garland. March 31 marks the centennial of Daylight Saving Time (this year,
Daylight Saving Time begins on March 11).
(Image Source: Driverlayer.com)
More information: Link >>> http://buhlplanetarium4.tripod.com/astrocalendar/2018.html#standardtimeact
Astronomical Calendar for 2018 March:
Link >>> http://buhlplanetarium4.tripod.com/astrocalendar/2018.html#mar
Related Blog Post ---
"Astronomical Calendar: 2018 February." 2018 Feb. 1.
Source: Friends of the Zeiss.
2018 March 1.
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Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
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* Astronomer, Educator, Optician John A. Brashear:
< http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
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