YearrooWhen did Arizona become the 48th state?
191220th century · 1900s
Arizona becomes the 48th state.
On Valentine's Day, the last of the lower 48 to join.
1912
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Around the same time
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- When did Roald Amundsen reach the South Pole?1911
- When was the first Indianapolis 500 run?1911
- When did the Titanic sink?1912
- When was the first crossword puzzle published?1913
- When did the first Model T roll off a moving assembly line?1913
- When did the US start a federal income tax?1913
- When did World War I begin?1914
Some events played out over months or years, so we use the year they are best known for. Spotted a mistake? Email [email protected].