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  2. History of United States postage rates - Wikipedia

    en.wikipedia.org/wiki/History_of_United_States...

    Postal rates to 1847. Initial United States postage rates were set by Congress as part of the Postal Service Act signed into law by President George Washington on February 20, 1792. The postal rate varied according to "distance zone", the distance a letter was to be carried from the post office where it entered the mail to its final destination.

  3. Postage stamps and postal history of the United States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    Airmail in the United States Post Office emerged in three stages beginning with the 'pioneer period' [57] where there were many unofficial flights carrying the mail prior to 1918, the year the US Post Office assumed delivery of all Air Mail. The US Post office began contracting out to the private sector to carry the mail (Contract Air Mail, CAM ...

  4. United States Stamp Society - Wikipedia

    en.wikipedia.org/wiki/United_States_Stamp_Society

    The United States Stamp Society (USSS) is the largest philatelic organization dedicated to the research and study of United States postage and revenue stamps. The Society is a non-profit collector-based organization with a world-wide membership of over 1700. The USSS is Affiliate #150 of the American Philatelic Society (APS).

  5. Non-denominated postage - Wikipedia

    en.wikipedia.org/wiki/Non-denominated_postage

    The first United States non-denominated postage stamp, issued in 1975, was valued at 10 cents. Non-denominated postage is a postage stamp intended to meet a certain postage rate, but printed without the denomination, the price for that rate. They may retain full validity for the intended rate, regardless of later rate changes, or they may ...

  6. Washington Bicentennial stamps of 1932 - Wikipedia

    en.wikipedia.org/wiki/Washington_Bicentennial...

    The bicentennial stamps were first placed on sale January 1, 1932, at the post office in Washington, D.C. While the bicentennial issue presents many unfamiliar images of Washington, the Post Office took care to place the widely loved Gilbert Stuart portrait of the president on the 2-cent stamp, which satisfied the normal first-class letter rate and would therefore get the most use.

  7. Category:Postage stamps of the United States - Wikipedia

    en.wikipedia.org/wiki/Category:Postage_stamps_of...

    This category contains only the following file. Stamp 1996US hanukkah.png 392 × 254; 40 KB. Categories: United States Postal Service. Philately of the United States. Postage stamps by country.

  8. History of calendars - Wikipedia

    en.wikipedia.org/wiki/History_of_calendars

    In 2013, archaeologists unearthed ancient evidence of a 10,000-year-old calendar system in Warren Field, Aberdeenshire. [2] This calendar is the next earliest, or "the first Scottish calendar". The Sumerian calendar was the next earliest, followed by the Egyptian, Assyrian and Elamite calendars. The Vikram Samvat has been used by Hindus and Sikhs.

  9. Hanke–Henry Permanent Calendar - Wikipedia

    en.wikipedia.org/wiki/Hanke–Henry_Permanent...

    Under the Hanke–Henry Permanent Calendar January, February, April, May, July, August, October, and November have thirty days, while March, June, September, and December have thirty-one so that each quarter contains two 30-day months followed by one month of 31 days (30:30:31). While the Hanke–Henry Permanent Calendar changes the length of ...