The Penny Black postage stamp becomes valid for use in the United Kingdom of Great Britain and Ireland.
World's first adhesive postage stamp
🗓️ 6 May 1840
The Penny Black was the world's first adhesive postage stamp used in a public postal system. It was first issued in the United Kingdom on 1 May 1840 but was not valid for use until 6 May. The stamp features a profile of 21-year-old Queen Victoria.
