Washington 2006
On May 27, 2006, the tenth US International Philatelic Exhibition opened at the Washington Convention Center in Washington, DC. Officially named Washington Philatelic Exhibition Inc., its most often referred to as Washington 2006.
Postal History
Canada Centenary Issue
On May 25, 1967, the Canada Centennial stamp was issued in Montreal – the first time a US stamp had a First Day ceremony in another country.
First Alphabet Rate Change Stamp
On May 22, 1978, the US issued its first in a long series of Alphabet rate change stamps.
Opening of SIPEX
On May 21, 1966, the Sixth International Philatelic Exhibition opened in Washington, DC.
Trans-Atlantic Airmail Service
On May 20, 1939, the US Post Office inaugurated its official trans-Atlantic airmail service to Europe.
First US Airmail Flight
On May 15, 1918, America’s airmail service began when two Curtiss Jenny’s departed New York and Washington, DC.
Discovery of the Inverted Jenny
On May 14, 1918, stamp collector William Robey discovered the now sought-after Inverted Jenny, #C3a.
Kansas-Nebraska Stamps
On May 1, 1929, the Kansas-Nebraska stamps were officially placed on sale.
First US Aerogram
On April 29, 1947, the US issued its first aerogram, then called an air letter sheet.