On March 11, 1977, the USPS issued its first se-tenant stamps in booklet form. The stamps had two different denominations, one to meet the first-class rate and one to meet the postcard rate. This issue also included the first multi-color booklet stamp.
On December 3, 1775, the Grand Union flag was reportedly flown for the first time.
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 July 16, 1790, the District of Columbia was established with George Washington’s signing of the Residence Act.
On July 14, 1932, the International Peace Garden was dedicated, representing the peaceful relationship between the United States and Canada.
On July 4, 1987, the USPS issued the first in a series of stamps honoring America’s first 13 states. The series honored each state’s 200th anniversary of statehood as well as the bicentennial of the ratification of the Constitution.
On June 14, 2008, the USPS issued the first set of stamps in its Flags of Our Nation Series.