On June 14, 2008, the USPS issued the first set of stamps in its Flags of Our Nation Series.
On April 29, 1961, the World Wildlife Fund (WWF) was founded.
Jean Rabin Audubon (later known as John James Audubon) was born on April 26, 1785, in Les Cayes, Saint-Domingue – today’s Haiti.
On April 11, 1925, the US Post Office issued its first Special Handling stamp, #QE4.
On February 23, 1976, the USPS issued its first 50-stamp se-tenant.
Artist Albert Bierstadt was born on January 7, 1830, in Solingen, Germany.
On December 28, 1973, President Richard Nixon signed the Endangered Species Act into law in an effort to protect threatened species from extinction.
On November 16, 1902, a cartoon appeared in a newspaper that inspired the creation of the first teddy bears, named after President Theodore “Teddy” Roosevelt.