On April 3, 1991, the USPS issued its first stamp to printed outside the US. News of the stamp’s printing outside of America set off a firestorm of criticism and debate that made it all the way to Congress.
On March 22, 1917, the US Post Office rushed to issue two new stamps to meet an urgent need. These high-value stamps were needed quickly for use on packages going to Europe.
On March 1, 1972, the USPS issued the first stamp in a new series honoring the 100th anniversary of the world’s first national park. Exactly 100 years earlier, Congress established Yellowstone as a national park to protect its unusual features and resources.
On February 28, 1973, the USPS issued the first of seven stamps in its new American Arts Series. The stamps in the series honored artists from several different genres, including painting, music writing, and filmmaking.
On January 28, 2013, the USPS issued the first stamp in its Global Forever Series. These stamps are used on international mail.
On November 18, 1902, the US Post Office issued the first stamp in the Series of 1902-03.
On November 12, 1903, the new 2¢ Washington stamp was issued with a new design after the earlier stamp was deemed disappointing.
On November 1, 1966, the US Post Office issued its first Traditional Christmas stamp, picturing the Madonna and Child with Angels, by Hans Memling.