First Commissioned Female Airmail Pilot
On May 23, 1918, Katherine Stinson became the first woman hired by the post office to deliver airmail in the US. She had several other notable firsts and records in her short flying career.
Postal History
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Butterfly Series
On May 17, 2010, the USPS issued the first stamp in the Butterfly Series. The stamps were created for use on envelopes that couldn’t be sorted on the USPS’s automated equipment, otherwise known as “nonmachinable.” They’re often used for greeting cards.
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First US Aerogram
On April 29, 1947, the United States issued its first aerogram, then called an air letter sheet. It was a simple folded sheet of paper, but it offered Americans a cheaper and faster way to send personal messages overseas in the growing age of air travel.
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Service Indicator Stamps
On April 23, 1976, the USPS issued the first regular postage stamp to include a service indicator. While most Americans would never use it or notice it, the 7.9-cent Drum coil stamp quietly solved a problem that had complicated bulk mailing for decades.
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Charles Lindbergh, Airmail Pilot
On April 15, 1926, Charles Lindbergh made his first airmail flight, launching a new contract route between Chicago and St. Louis. Just over a year later, that same young pilot would become world famous—but on this morning, he was focused on carrying the mail safely and on schedule.
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Arming Postal Clerks
On April 9, 1921, Postmaster General Will H. Hays took an extraordinary step: he ordered the arming of postal workers who handled the nation’s most valuable mail. The order came after a sharp rise in armed robberies, when trains, mail cars, and postal employees had become targets for thieves looking for cash, securities, and registered mail.
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First Stamp Canceling Machine
On March 28, 1876, a Boston inventor received a patent that would transform the way America handled its mail. The Leavitt canceling machine didn’t just speed up a mundane postal task — it helped launch the modern era of mail processing. And it arrived at exactly the right moment.
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Bluish Paper Experiment
On February 16, 1909, stamps printed on an experimental bluish paper were issued. These stamps were part of an effort to prevent paper shrinkage.
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Short-Lived Mini-Scapes Series
On February 3, 1990, the US Postal Service issued a small, colorful stamp that marked a quiet shift in how everyday American mail could look. That Beach Umbrella stamp became the first release in the short-lived but distinctive Mini-Scapes Series.
