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England has only known seven White Christmases in the entire twentieh century!
1913 was the only year in the 20th century that Easter Sunday was on the 23rd of March.
No, Barack Obama is not the only president of the 20th century with only one U.S. parent. The 26th President of the United States, Theodore Roosevelt, had a Dutch father and an American mother.
1991
Harry S. Truman
Harry Truman
conga
You might be referring to the 1800's when you state the "18th century". The 1800's was actually the 19th century. The 1900's was the 20th century. 1. For infantry fighting; the main change was from muzzle loading firearms/cannon in the 19th century to breech loading cartridge firearms/cannons in the 20th century; plus the machinegun (which would not be possible with muzzle loaders). 2. 20th century navies were all steel, had submarines, and aircraft carriers. 19th century was transitioning from wood to steel, with experimental subs, and on the drawing board aircraft carriers (dreams). 3. 20th century saw men fighting in the sky. That was only a dream before the 20th century.
1. 1991 is the only number I think.
Harry Truman was the one.
china
Snowboards are very new. They were invented only in the last years of the 20th Century, so nobody had them before.