February 14 in American History

February 14, 1912 — Arizona becomes the 48th state

Arizona joined the Union on Valentine's Day, the last of the contiguous 48 states to be admitted. With it, the map of the mainland United States was, at last, complete — a coast-to-coast nation, 48 stars on the flag, where 136 years earlier there had been thirteen small colonies clinging to the Atlantic.

Common Questions About February 14

What happened on February 14 in American history?

In 1912: Arizona becomes the 48th state. Arizona joined the Union on Valentine's Day, the last of the contiguous 48 states to be admitted.

Why is February 14 significant?

Arizona joined the Union on Valentine's Day, the last of the contiguous 48 states to be admitted. With it, the map of the mainland United States was, at last, complete — a coast-to-coast nation, 48 stars on the flag, where 136 years earlier there had been thirteen small colonies clinging to the Atlantic.

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