Britain, France and the United States announce that on June 21, the Deutsche Mark will be introduced in western Germany and West Berlin. Over the next six days, Communists increasingly restrict access to Berlin.

The Deutsche Mark, abbreviated "DM" or "D-Mark" ( ), was the official currency of West Germany from 1948 until 1990 and later of unified Germany from 1990 until the adoption of the euro in 2002. In English, it was typically called the "Deutschmark". One Deutsche Mark was divided into 100 pfennigs.

June 18 is the 169th day of the year in the Gregorian calendar; 196 days remain until the end of the year.